If you have an old bookcase that you no longer need, or is a little too unsteady to use as a bookcase you can transform it into a super cheap underbed storage container! All you need is to buy some castors from your local hardware store. Just screw the castors onto the back of the bookcase, lay it down on its back and roll it under the bed. We have one of these in our boys' room for all their toys and it really reduces all the visible clutter. It's lovely to walk in and all you see are their beds!

We had the chance to travel overseas several years ago but had to save $1000 to make it happen. On one income with two small children it seemed impossible. Then I had the brainwave - I didn't have to save $1000, I had to save $1.00 a thousand times! This was so much easier - a generic brand product at the grocery store, a chocolate bar at the petrol station and so on, soon added up and the savings contributed to a great family holiday.

I have saved heaps by no longer buying expensive cleaning products. To clean my toilet, bath or shower, I quickly wet the area and let most of the water drain away. I then sprinkle the whole area with bicarbonate soda, using a small shaker (you can get them at Kmart for a few dollars). I then spray it with cheap white vinegar in a spray bottle. There is a slight chemical reaction that dissolves all the mould and dirt. Leave it for a few minutes to work. You still have to scrub a little and you may need to re-do any heavily soiled areas. It also works for benchtops and sinks, it's a cheap alternative to chemicals and good for the environment too.

For just $10 I've finally discovered soft skin. I had always suffered from dry skin and, over the years, had spent a fortune on moisturisers in every price range. I never really found anything that I could put on at night which left my skin soft and moist in the morning. It seemed my skin was always thirsty. Then I read in Vogue magazine, about a woman who used Neutrogena Norwegian Hand Cream as a facial mask. She also suffered from dry skin and her dermatologist had advised her to do this. Having nothing to lose, I decided to give it a go myself. It costs well under $10 and is available at Priceline and in most supermarkets. I chose the fragrance-free one and can honestly say it is the best moisturiser I have ever used. I use it every day under make-up and my skin looks 'dewy' all day long. I apply more in the evening before bed and my skin feels lovely in the morning. I even apply it thickly as a mask sometimes, with great results - and it beats a facial in terms of how my skin feels the next day. So if you have dry or mature skin - give it a try. It is also amazing on dry feet - it really is a miracle! It's amazing to think of how many dollars I will save from now on on my new, simple skincare product!

I had been living beyond my means for some time and knew I needed to trim my spending. For the last couple of years, I had been pretty careful with purchases, but was not succeeding in 'cutting my coat according to my cloth'. About eight or nine months ago, I decided I would only spend cold hard cash. I withdrew what I could afford to once a week from the bank and forced myself to make do with that until the following week. What a shock! The first couple of weeks, I was penniless within 24 hours and had long lists of unpurchased 'necessities'. My grocery shopping barely covered the bottom of the trolley. (What a joy when it came to unpacking it!) I discovered I could do without many things and started making all food (including bread) from scratch. Most things tasted better and I enjoyed cooking. I started buying vegetable seedlings and growing them, but have had to trim that back to seeds to supply us with enough. The junk food and alcohol are long gone - the money never makes it that far. I lost weight! But I still wasn't making ends meet, so I had to cut back on contents insurance. The result has been that I am more careful with what I do have and am becoming less concerned about material possessions as I am not acquiring expensive new ones anyway. I had more free time on the weekends as I didn't 'have' to scour the newspaper for the best buys and then rush around putting them on the credit card. However I still needed to trim my expenses, so I had to forgo my medical insurance. I find I am now so much more careful with my lifestyle, diet and exercise and I suspect it is because my subconscious knows that there is no comfortable private hospital or top specialist waiting for me if anything goes wrong.

Petrol is still a thorn in my side and I am very conscious of the percentage of my hard-earned money that is going on harming the environment just to get me to work. Tomorrow I have an interview for a less 'glamorous', but otherwise similar job within walking distance of my home. This would also increase my exercise. So far, the follow-on effects of spending only cash I have in my hand have not ended. But each time I have had to make a tough decision about which 'necessity' to forgo to live within my means, I have discovered that going without is not as bad as I feared and that, oddly enough, I am now healthier, happier, less rushed, more in control of my life and proud of my resourcefulness than I ever was when I had everything I thought I needed.

Our story is a great example of how thinking outside the square has enabled us to get ahead, even through the toughest of trials. My husband is on a disability pension receiving $450 per fortnight and I work 20 hours per fortnight earning $397. I have chosen not to apply for Centrelink benefits due to the numerous requirements. Our uninsured home burnt down 10 years ago leaving us homeless (I went into premature labour and spent six weeks in hospital with complications so I had somewhere to stay but my partner lived in our car with our two dogs for this time). We were at the lowest point ever and could not imagine how we were going to survive. We were advised to go bankrupt, which we did but we were now unable to get finance (in hindsight an absolute blessing) to get another house.

We did what most people do and rented a house in the suburbs thinking this was it for us. After three years of this we decided to look elsewhere and found a house in 'woop woop' which was $6000 (pre-real estate boom). Using my first home owner grant we purchased our house and although it was two hours from anywhere good, it was ours outright. This in itself is a handy hint to look outside of the box - our 'woop woop' town had a doctor, a supermarket and a school so it was fine and we lived there happily for another three years. At this point the real estate boom happened and we sold our house for $48,000 and decided to look outside the box once again. We ended up 2000km away from home in a place two hours from Adelaide. We still live here happily and after four years the value of our property has gone from $35,000 to $95,000 (I swear getting our first home owner grant was like winning the lottery).

But we still couldn't save any money so two years ago I cancelled my fortnightly family tax benefit from Centrelink (approx $200 per fortnight). It was hard - very, very hard for the first eight months but then it was tax time and I was very surprised when I received a tax return of more than $7000 with my lump sum FTB part A and B. We paid our bills and bought a second hand car. This year I paid a little extra tax each week ($10) and was pleasantly surprised by an $8000 tax return. With this we bought a block of land 30 minutes down the road (in a bigger town closer to Adelaide). The value of this block is double what we actually paid! Some people say we were lucky but luck had nothing to do with it - we were just prepared to live in very yucky houses in areas no one wants to live. Three months ago a house in our town sold for $21,000 which is around the same as the first home owner grant now and there are still others which would be around the same price. We don't have sewerage or town water but we have a school and a pub so it was certainly a change in lifestyle.

Other people have asked how we are doing so well now and I just laugh! We are earning $845 per fortnight and I have chosen not to work extra hours so I can still be a stay at home mum to our diabetic 10-year-old. We have private health cover, Internet, insurance, power, phone, petrol expenses ($100 fortnight), rates, medical expenses and even private school fees to pay but we still have enough to go around and often support other people with food, even though they are making much more than us. This year we plan on buying a second hand relocatable house for our block with our tax return. It may be a form of forced savings by not getting a fortnightly benefit but when it comes in it is amazing. Thanks to careful budgeting and Simple Savings we easily survive!

After reading The $21 Challenge, I thought I would see which other areas of my life I could apply the Challenge to.

First, I opened a separate bank account and now deposit $21 every week before I do anything else with my money. I see this as a type of retirement fund – it will be nice to see the funds in 30 years time!

My next $21 Challenge is to only put $21 worth of petrol in my car each week. I will park my car further away from where I need to go; this will save money and improve my fitness and wellbeing.

When my phone contract ends soon, I am going to challenge myself to spend no more than $21 on pre-paid phone credit each month - now that will be a challenge!

There are so many ways we can implement the $21 Challenge in our lives, thanks to Fiona and Jackie's inspirational book.

School holidays are more affordable with the help of the $21 Challenge! Money seems to slip away so effortlessly while out having fun with my teenage kids. Budgeting is something I am trying to teach them about but it is hard to make it relevant sometimes. Then I had a great idea that would make them pro-active with the weekly budget over the holidays, without me being a 'budget nag'.

It is the $21 Challenge week, with a twist. THEY have to go and log all the food in the freezer and pantry, and make up the meal plan for the week. Then all the money THEY save us for the week can go towards some guilt-free fun. It's a great incentive and my kids are learning important household skills.

I leave for work at 7.30am and get home at 6.30pm, but I still need to prepare dinner for my husband who starts night shift at 5pm. If I turn on my slow cooker at 7.30am, the food is sometimes overdone by the time he gets up at 3.30pm.

To solve this problem, I have purchased a cheap plug-in timer, just like the one people use to turn on their lights when they go on holiday. My cooker now comes on during the day and dinner is perfectly cooked by 3.30pm! This saves on power because the slow cooker is not turned on all day.

Sometimes I feel as though I've lived on a budget all my life! I live alone in a second floor rented apartment - no yard or garden, just a concrete car park. To combat that 'locked in' feeling, I have endeavoured to bring the outside in for little cost.

I have several indoor plants; beautiful, green and healthy. My small cold water fish tank has two goldfish in it, they are healthy and lively and provide colour and movement darting around. Very cheap pets too, a can of fish food lasts for ages and you can get all kinds of tanks to suit any budget.

I conserve water by using the 'old' water from the fish tank when I change it to water my plants, giving them lots of nutrients! I also use the water left from steaming vegetables to water the plants too.

I have no car, so must walk to get my groceries and other needs. I tell myself this is all POSITIVE. Everytime I walk to the shops and back it is exercise and energy sustainable. I'm not creating any air pollution either!

Almost all my clothing comes from the local opportunity shops - guess you could call me Second Hand Rose! I have three good op shops in my area, which are also great for cheap books, kids' toys - just about anything you can think of!

Frugality is not about being 'mean'; it's often very necessary for those on a fixed and limited income - and it can be a lot of fun!