I have saved $50 in virtual coins in just a few weeks, since I started using my online money jar! I like the idea of emptying out my purse at the end of every day and placing loose change into a money jar to help me to save. The trouble is, I don't really carry any cash on me any more! Whenever I need to buy something I transfer the exact amount onto my debit card then go out and buy it. This ensures I never have excess cash to spend but it makes it difficult to save loose change. So I came up with this idea. Every time I log on to Internet banking I check all my savings accounts and transfer all the cents into a separate savings account called my 'e-Money Jar'. It's working perfectly and is amazing how quickly those few cents soon mount up!

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.

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!

I have turned my love of a good bargain into something far more valuable! Whenever I am tempted to buy something I could possibly do without, I first calculate how much we would save by paying that money into our mortgage instead. For example, I recently saw a new dress on sale for $49.99 - a bargain, right? However, I paid a quick visit to a mortgage calculator website and discovered that if I didn't buy the dress and put that money onto our mortgage instead, it would take a whole month off the loan term and save us $334.39c in interest. In other words, my 'bargain' dress would really cost me over $300!

Looking at my purchases this way has become a really easy and effective way to curb my spending habit. Now I carry a piece of paper in my wallet with various prices on and I can see how much I would really be spending. It's amazing how much stronger my willpower becomes when I check my piece of paper before buying something and find out what its real cost is!

I make this vegetable pasta sauce for three reasons - it's cheap and healthy and it uses up leftover vegies (cooked and uncooked) so I save three times!

Whenever I serve up a dish of vegies for dinner (usually broccoli, carrots, beans and zucchini in my house) and it isn't all eaten, I put the leftovers in a ziplock bag and throw it in the freezer. Then, when my fresh vegies are starting to get to that 'oh dear' stage, I start cooking!

In a big pot, with a bit of olive oil, I fry onion and garlic and add all the 'oh dear' vegies - sometimes there is a fiddly bit of broccoli that is too small to use in a meal or carrots that are starting to wilt. Other vegies I have added include celery, cauliflower, broad beans, spinach, cabbage and capsicum. I chop and cook all of this - in summer I add fresh tomatoes, in winter I throw in a couple of cans of Home Brand tinned tomatoes. To this I add the frozen leftover vegies, a squeezie stock concentrate or stock cube and some water.

I cook the whole lot until everything is soft, and then I blitz it in a food processor or with a Bamix until it looks like pasta sauce. I then freeze this in meal-size portions and use it for everything - I add it to mince for bolognese, or just use it neat. My kids don't know it's full of vegies - they just think it's another jar of commercial pasta sauce!

To help me stick to my budget, I use the 'purse system', where I allocate a certain amount of money each payday to pay for different things, for example, petrol or groceries.

I found the envelope system aesthetically unappealing and difficult to operate, so I purchased a number of small pencil cases from Office Works; they're the perfect size to fit dollar notes into and any receipts for that particular 'budget purse'. I have a red case containing money for my groceries, a black case for my petrol and so on. They are also attractive enough that I use them as my wallets for these purposes; unlike envelopes, I am never too embarrassed to pull a case out and carry it into a shop. The cases cost $8.00 each but they motivate me to stick to a budget - a huge long-term saving!

Instead of buying Christmas presents this year, I asked my parents to write a 'book' for their grandsons. My boys love listening to bedtime stories so I thought this would be a great way for them to learn more about their grandparents and what they did when they were younger.

At first, my parents didn’t know what to write about, so we went through old photographs, scanned them into the computer and they wrote about what was happening in the pictures. We didn’t just use the usual photos like wedding pictures, but chose lots of candid shots and even photographs of places that evoked memories for my parents.

In the process of putting these books together, I learned things about my parents that I didn’t know and it made me realise that the 'book' would also be a perfect Christmas present for my brother and his family. So, for the cost of a few sheets of paper and some printer ink, I have an inexpensive gift that is priceless!

This simple bill payment system lets you take a holiday from paying bills at Christmas time.

Every time I receive a bill, I pay $10 more than the amount required. For example, if the monthly phone bill is $50, I pay $60. This has worked really well for me, and come December I am able to stop the phone, internet, power and rates payments. I use this money for Christmas gifts, safe in the knowledge that my bills are covered.

Here is a hint that has saved our family time, money and arguments, not to mention countless wasted scraps of paper. This year we purchased a large diary for family use, labelled it 'Bench-top Notes' and sat it on our bench. In this diary we write notes to each other that in the past, would have been on scrap pieces of paper that would often be missed or mislaid. Anything from appointment reminders, details of missed phone calls, housework or instructions for our teenage boys, or just simple but personal notes to each other such as 'Hi sweetie, have a great day, I love you, see you at 5.30!' and so on! It has tidied up our bench-top, kept us all organised and an added bonus is that we can look back on our entries for confirmation of bills being paid, appointments kept or cancelled with the reason why and smile at the little love notes to and from each other. This diary cost about $12 but it now contains the priceless and lifetime memories of our 'Bench-top Notes'.