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.

A novel idea to help my Mum save on new ceiling fans has led to some fantastic and unexpected long-term savings! After being quoted a whopping $160 per unit (pensioner rate) to get ceiling fans installed, we took matters into our own hands and placed an advertisement on local notice boards. It read: 'Experienced licensed electrician required to install three ceiling fans. I would like to trade the costs by doing your washing and ironing for one month.’

Within a few days, Mum had received several enquiries and selected a nice, young single guy who needed a 'mother's touch' to some of his clothes - a lot of stain removal and buttons re-sewn. He installed the fans and dropped and picked the clothes up from her place on a weekly basis. To our surprise we learned he also had connections to plumbers and gardeners and she was soon able to have her bathroom wall retiled in exchange for scrubbing out an oven and re-organising a food pantry for a couple that were having a baby soon.

It didn’t stop there! Before long she was taking up hems, sewing on buttons and doing basic mending in exchange for garden maintenance and mowing lawns. These guys are ripping up old items from homes every day with their trades so these days they even search around to find her the cheapest - or even free - items if she needs them, as well as providing an oven door and dials on her heater for free. They often come across things that others could use but end up in the tip instead.

As a pensioner, Mum has time on her hands and is very experienced in household chores but has a limited income. This trade of skills and services means she can now carry out tasks within her ability and has made some fantastic friends. Her place looks amazing and is she even happy to do babysitting for the families. In turn they really appreciate having a cuddly grandmother figure around. She has a new purpose and a whole new social network too - in fact she looks 10 years younger!

Just one plastic container is all you need to organise your freezer and save a small fortune on storing frozen food! I recently read an article which suggested freezing tasty, home cooked meals in small containers so you can whip one out in less time than it takes to get takeaway. Brilliant idea - but going out and getting all the plasticware I needed to do this was going to kill my miserly budget! So instead I bought just one plastic container that was an ideal size and a huge stack of small freezer bags. Now whenever I freeze a meal, I can line my single container with a freezer bag, seal it and once the food has been frozen, I can simply remove the container as though it was a cake tin! I have a ready-made 'freezer mould' and my freezer is still tidy with perfectly rectangular, scrumptious meals in minutes!

About a year ago my husband and I were having lunch at a seaside cafe when we noticed the people next to us paying their bill with $5 notes. We found out that they were on a trip around Australia and every time they were given a $5 note, they saved it and used it toward their food bill.

Thinking this was much better than saving $2 coins, I started doing the same. As soon as I receive a $5 note in my change, I pop it into my purse and then put it in a money box when I get home. I keep track of how much is in the box by writing the amount in my diary; when I get to $500 I empty the money box, take it to the bank and put the money into a term deposit for a rainy day.

So far I have saved $1435! I never miss the money and most times I go shopping I come home with at least one $5 note!

I have saved a fortune on laminating costs over the years, by doing my own at home. I don't have a laminating machine though - I don't need one! I just buy the laminating pouches I need and get exactly the same effect using my household iron on a low setting. You just need to ensure you are working on a fairly rigid surface - if your ironing board is too 'spongy', strengthen the surface by adding a piece of cardboard, covered with cloth before laminating. When applying the iron, put a cloth or other fabric between the plastic and the iron. The results are just the same as using a machine and the heat will gently fuse the pouch together. I have done this for so long, that I don't know how much laminating costs any more, because I never pay to have it done!

Protect your personal wallet contents for just a few cents. Just go to your local library and empty your wallet or purse on to the photo copier (license, cards, Medicare - everything!) and make a copy. It can save you hours of worry and extra money should your wallet get lost or stolen. You will have all the numbers and information you need for reference handy - not with the thief!

I am on a very, very low income, so I budget for every bill and expense. I put away bill money every fortnight and that way I have all my bills covered as they arrive, and we seem to just spend the rest. Last year I decided to pay me as a bill, so every pay day I pay me first, just $50. I now have over $1200 in savings. I can't believe how easy it is; just pay yourself before everyone else. The first couple of pays it was an effort not to touch it, but as soon as I saw it mounting up, I got very excited. I tell myself all the time that money is power. While $1200 is not much to some people, to me it's a fortune. Try it - it empowers you.

I am a young woman on a single income, paying off my homeloan. I know the amazing financial savings that are possible when you make extra payments of any size on a large loan. However, because I am on a low annual income I often find it very hard to find any spare cash after all the bills have been paid.

So for birthdays and Christmas, when my friends and family are seeking ideas for gifts to give me, instead of asking for things I don't really need, I ask them to deposit the amount that they would have spent on a gift straight on to my homeloan. I am very close with my friends and family and they understand my financial situation. They are only too happy to help me get ahead and hopefully one day own my own home. It is a gift that keeps giving and one I truly appreciate. I read recently that for every extra $1.00 you are able to pay against the principal of your homeloan you will save $2.00 in return and take years off your loan. The understanding and generosity of my friends will help save me tens of thousands in interest over the years.

I have a family of five children and I like them to eat healthy food that is inexpensive. I often try healthy recipes, and have found one for muesli bars that the kids (and Dad) and their school friends love. It's quick, easy, healthy (you know exactly what's in it) and economical.

Muesli bars

1 1/2 cups toasted muesli

(we use the apricot and almond variety; it doesn't have to be an expensive type)

2 1/2 cups of Rice Bubbles

1/2 cup coconut

1/4 cup crushed nuts

125 g butter (salt-reduced butter is good)

1/2 cup honey

1/2 cup peanut butter

1/2 cup raw sugar

1/2 cup choc chips

(I also add a tablespoon of linseed for extra fibre and omega-3 vitamins; they don't even taste this healthy addition.)

Mix the dry muesli, rice bubbles, coconut and nuts in a bowl. Place butter, honey, peanut butter and sugar into a small pan. Stir over low heat until melted. Allow to come to the boil then reduce the heat to simmer without stirring for five minutes. Pour this into the dry ingredients and stir well. Allow to cool to room temperature (about 20 minutes). Add choc chips and mix again. Line a scone tray with aluminium foil and press the mix into the tray until it is flat (you can use a glass to do this). Refrigerate until firm. Slice and serve. Store in the fridge for up to three weeks (if it lasts that long).

These save a fortune. This mix makes just over a kilo of muesli bars (I use a tray that is approx 28 cm x 36 cm and this will slice up to 30 standard size muesli bars). It costs around $3.50 to make (which can be less if you shop around and use generic or Aldi brands of butter, Rice Bubbles and muesli). Home Brand muesli bars are about $1.69 for six ($0.28c each) compared to around $0.11c each for these home-made ones. Uncle Toby's muesli bars cost between $0.40c and $0.49c per muesli bar.

Save on trips to the shops during a chocolate craving, with the most dangerous chocolate cake recipe in the world! It’s called Five Minute Chocolate Mug Cake.

Ingredients:
4 tbsp flour
4 tbsp sugar
2 tbsp cocoa
1 egg
3 tbsp milk
3 tbsp oil
3 tbsp chocolate chips (optional)
Small splash of vanilla extract

Method:
Add dry ingredients to a large coffee mug, and mix well. Add the egg and mix thoroughly. Pour in the milk and oil and mix well. Add the chocolate chips, if using them, and vanilla extract and mix again. Put your mug in the microwave and cook for three minutes at 1000 watts. The cake will rise over the top of the mug, but don't be alarmed! Allow to cool a little, and tip onto a plate if desired. This can serve two if you want to feel slightly more virtuous.

And why is this the most dangerous chocolate cake recipe in the world? Because we are now only five minutes away from chocolate cake at any time of the day or night!