I took on the $21 Challenge, and won! However, my husband was a rather grumpy participant; he loved the savings but not the lifestyle during Challenge week. As he goes away regularly, I decided that every night he's not home for dinner would become a $21 Challenge night for the kids and I - all meals must be made from ingredients I already have at home, and I can only use ingredients that have not been allocated for other meals. This saves money and gives me a night off cooking, as my Challenge meals are usually simple affairs, sometimes as easy as pancakes or toasted sandwiches.

The true value of the $21 Challenge became apparent when a friend was recently diagnosed with a severe form of leukaemia. She is a married mother of four boys and is embarking on a long therapeutic journey that will hopefully lead to a full recovery. As a way of helping her family, the parents at our school have banded together to make all their meals for the next three to six months. As they are a large family, with an above average food requirement, I was unsure how I could afford to help feed them each week. Thankfully, my husband was away the week my friend was diagnosed, so the kids and I lived off the $21 Challenge that week and all leftover money was put into making meals to freeze for my friend's family.

We now do the same thing whenever my husband is away – it's a great gift over the Christmas break to know that I can afford to cook and freeze meals for my friend's family, and look after my family at the same time. Thank you.

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!

To enjoy the convenience of pre-grated cheese, buy a block and grate your own - much cheaper than spending money on those costly supermarket bags!

Buy a block of cheese, grate it into a large ziplock bag and add a rounded tablespoon of cornstarch to the bag. Shake well.

This keeps the cheese from sticking together in a lump and you can store it in the freezer for as long as you want. It thaws almost instantly!

We are a family of only two adults who cook often with a large crock pot. However we do find ourselves with a heap of left overs after cooking a pot full of food. So, instead of filling the crock pot with enough food for one meal several times over, we now take two oven bags and divide our meat/chicken/fish between both bags. We add different flavourings to each bag then arrange both bags in the slow cooker and cook on low for eight hours. I have just made Chicken Korma in one bag, using drumsticks that were on special with an extra pinch of cinnamon and some chilli, and Mediterranean Chicken with olives in the other bag. The conflicting smells are surprisingly delightful and the final result is two delicious meals both cooked with the same amount of power I would have used for one. Any extras we don't consume straight away I simply freeze and save for a later date.

For many people juggling work, family and study, time is the most important saving they can make. I work four days a week, have a three-year-old and studied part-time for a diploma for a year. I got by with these time-saving tips:

1. Lowering my expectations for the house. I don't need a spotless house, but a tidy and lived-in home.

2. Doing my housework little and often, rather than spending huge amounts of time tidying up. I do things like:

- put my little one's daycare bag together for the next day as soon as we get home in the afternoon.
- cook my lunches (pasta and sauce, muffins and so on) once a week and freeze them.
- put my lunch box together from the freezer in the evening.
- clean the toilet by putting a teaspoon of Napisan in it each night. It soaks overnight and the bowl is clean with the next flush.
- do laundry when enough for a load accumulates so we don't have a sudden clothes drought, then an avalanche of laundry to do and put away.

3. Exercising on a stationary bike in front of the TV in the evenings after my little one is in bed.

4. Programming our DVD recorder once a week (Sundays when we get the new TV guide) so I don't miss my favourite shows.

5. Filling cereal bowls with water if I am rushing and have to leave the breakfast things. This makes them easier to clean later and stops ants.

6. Trying not to double handle things. Rubbish goes straight in the bin, meat is put in meal size portions in plastic bags and frozen as soon as it gets home, magazine subscriptions go straight to magazine rack when they arrive in mail.

7. Leaving rooms better than when I arrived, so the need to tidy doesn't build up. It only takes five minutes to put laundry from the floor to the hamper, make the bed, wipe a bench, replenish the toilet paper.

8. Recruiting my little one to help - she's only three but she can put dirty dishes in the sink, put toys away in her room, dirty clothes in the hamper.

9. Shopping for groceries by myself in the evening so hubby can watch his TV shows in peace and I am not tempted to go to other stores as only the supermarket is open. Also many things are marked down at that time.

10. Trying to do three things for myself that make me feel happy each day, like listen to podcasts while I do the housework.

11. Writing the shopping list progressively through the week so I can pick it up and go when it's time to do groceries.

12. Storing the bedding in storage containers under each bed so it's quick to make the bed, especially when changing my little one's wet sheets in the middle of the night.

13. Shopping for presents at sales during the year (online or in stores) so I don't need to go to crowded stores during the Christmas rush.

14. Not beating myself up if I find lifestyle changes tricky at first - I am afterall human!

When I separated from my husband and was left with three children, I had no income apart from the pension. Food was getting very scarce, so I had to become creative. Every second week I drove to Flemington fruit and vegetable markets in Sydney (about closing time when most food is the cheapest), bought food by the boxes, and spent the whole day processing it. I made vegetable lasagnes, which I would freeze, all sorts of sauces, vegetable selections for stir frying and steaming, mango ice blocks (pureed mango only) and so on. We would use the most perishable fruit and vegetables the first week and the others later. Eventually we started to have an overabundance of food.

Then I told a few friends of my system, and very soon I was running a little co-op. I started to go to the markets every week and buy a greater variety of food. I got my fruit and vegies free and could also split up my petrol bill for the week amongst participants of the co-op. They got their food much cheaper than in the shop, and I got my food and petrol free.

Apart from that we had the freshest food, with fresh fruit or vegetable juices every day. Out the window went fizzy drinks and any convenience foods. It is now about 14 years since we started to eat like this, and we don't even have a family doctor, because we hardly ever get sick. How much we saved on medicines I cannot even begin to calculate.

Instead of paying for one expensive doona, and the dry cleaning costs that come with it, buy two or three cheap doonas, pin them together at the corners, and put them into the same doona cover.

Because cheap doonas are thinner, you can wash them one at a time in your washing machine, and you can also adjust the warmth. When the weather starts getting warmer, just take one doona out of the cover and put it away in the cupboard.

Simple Savings has become a way of life. I don't have to think about saving or spending now - it just comes naturally. In the past five and a half years, we have managed to pay a whopping $150,000 (principal) plus interest off our mortgage and still live happily and comfortably. This is all due to Simple Savings.

My husband and I have three young children and our combined income is only average, ranging between $50,000 - $70,000 per year. Readers may think 'I could never do that, I would have to go without too much' or 'that's impossible', but this is not true. We don't go without; in fact we feel we do pretty well! I cannot name just one single thing that has helped us to achieve this and still be happy - it is a multitude of tips and hints, all of which can be found on your site. I have always been a Simple Saver, so for me this was not hard, but my husband found not being able to spend money willy-nilly difficult at first. These days, I am proud to say he thinks before he spends and at times even proudly tells me of his smart purchase or why he didn't purchase!

I could go on and on giving examples on how to do what we have done, where we saved money and how we used it more wisely, but that would make a book and to be honest all people have to do is log on to your site, it's all there. Focus on your goals, walk hand in hand with Simple Savings and your dreams can come true.

My husband is self-employed and over Christmas and New Year we were waiting on a payment that had been due in November. I had not done any shopping for over a month, and we felt like there was nothing in our pantry, especially my five kids who repeatedly moaned ' there's nothing in here!’

Of course, that wasn't the case. It's amazing what you have stashed away in containers or hiding at the back of each shelf. On a closer inspection, we found dried beans and lentils, flour, sugar, cous cous, rice and lots of other bits and pieces.

We managed to feed our family of seven on the 'nothing' in our pantry for another two weeks. We are lucky enough to keep chickens, and have a very basic vegetable garden, so all I really needed to purchase was milk. We made pancakes, pikelets and scones, and even a chocolate cake with the cocoa we found - these snacks kept the kids, and hubby, very happy!

We survived until our very overdue payment finally arrived. We have now decided that we will eat the cupboard clean every month, as this encourages us to save money by using what we already have and by not allowing things to go out of date.

I have two daughters who live at home with me who are both university students. They both work part-time and pay me $50 a week each for everything. (And I mean absolutely everything!) I had begun to get sick and tired of their wasteful habits! I would find half eaten muesli bars lying around, week-old uneaten fruit, discarded shampoo bottles and toothpaste tubes with enough in the base for three or four more uses, soap in the bin which still had plenty of use left in it and the list goes on! Quite frankly, I'd had enough! I told them to keep their $50 a week and instead they could buy everything for themselves (snacks, lunches, toiletries and so on). I would provide their one evening meal and that was it. I even made them buy their own toilet paper. Well after two weeks they have decided to mend their ways! They just did not realise the costs involved in running a household and admitted they had taken things for granted. I only wish I had done it much sooner, for their benefit and also mine! One daughter can only afford to give me $50 still and her older sister has increased her amount to $70. However, I think things around here are going to be very different from now on as my Sad Sallys strive to become more like Happy Hanna!