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.

We are saving over $600 a year on shoe deodorisers! My husband has terribly smelly feet and is very embarrassed by the problem. It was costing us approximately $12 every week to buy different shoe inserts and powders, all of which were only temporarily effective. Now it only costs us $2.00 every two months! My husband has discovered that just a few drops of waterless hand sanitiser on each foot kills all the bacteria that causes the feet to smell. It takes just a few seconds to apply and evaporates very quickly, meaning no mess on his feet, socks or the carpets. He buys the large bottles of sanitiser for only $2.00 in the bargain stores and they work brilliantly. All his shoes, including his work boots, are now completely odourless!

Make over 120 bickies for just $4.00! This fantastic basic bickie recipe is terrific value, makes loads and has lots of room for variations:

500g margarine
1 tin condensed milk
1 cup sugar
5 cups self-raising flour

Cream sugar and margarine. Add condensed milk and flour. Roll into teaspoon sized balls and press down with a fork. Place on greased trays and bake in moderate oven until golden brown (approximately 10-15 minutes).

Before baking I divide the mixture into five and add the following ingredients for different flavoured bickies:
1. Chocolate chips and glace cherries (chopped)
2. Cornflakes and sultanas
3. Hundreds and Thousands
4. Jam drops
5. Milo and coconut

You could add any number of other things like Rice Bubbles, Smarties, nuts, cinnamon and other spices and so on. The raw mixture can be frozen in balls, just thaw slightly before baking.

From this one batch we made 123 bickies and by my calculations using the cheapest possible ingredients, the whole batch cost just over $4.00 to make!

A great way of enjoying a fun activity while learning a valuable skill is to teach your kids to cook. I set up cooking lessons once a week after school for my two girls and their two cousins in our kitchen at home. The focus is on one recipe each week, something they can bake and take home. It's all about the kids having hands-on fun and there is a lot of chatter and laughter. The kids love it!

Saving $1.00 a day has helped me afford things I would have otherwise struggled to pay for. I started doing this when my sons started at a private school in the city. They would be invited to several birthday parties throughout the year, so to ease the financial burden of gift giving I used my money box. At the end of the year I would use whatever was left to buy school supplies for the following year.

My children have left school now but I still save my $1.00 a day which I use to treat myself to a pedicure, go to a movie or have coffee with friends. It's such a small amount each day that I find it doesn't really affect my household budget, but it always came to my rescue when I needed it, and now affords me my treats.

Smaller portions means larger savings, as you'll see in this hint.

After having a little money left over from a gift voucher, I purchased a set of three small loaf tins. (each tin holds 1/3 of a normal cake mix). I made up a chocolate cake mix and baked it in three tins. I kept one cake aside and put two in the freezer as soon as they were cold. This meant the cake lasted three days instead of just one. I remove the bar cake from the freezer each morning and not long after the kids are enjoying their smaller slices of cake, with no complaints.

I have since carried this over to savoury dishes. When I make meatloaf, I put the mixture into one large tin as well as the three smaller tins. We eat the larger meatloaf for dinner and I freeze the other ones for lunches. This is working really well for me and the savings are huge.

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.

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!

I pay myself to exercise! Now, you may wonder how that actually saves me money. Because my exercise is free, usually walking with a friend or working out to DVDs I've received as gifts, I don’t have to buy expensive exercise clothes or pay for a gym membership. And paying myself to exercise? That gives me motivation. I started with $1.00 for every day I exercised, and increased it to $2.00 a day - still cheaper per week than a single exercise class or gym membership! I wait until I have enough money for a facial or massage, and treat myself.

I find that the end goal of some pampering really works as an incentive to keep exercising. Prior to this, I never let myself splurge on those sort of things. I am now happier, healthier and far more relaxed!

This hint was a saviour during our last $21 Challenge.

The girls were looking for lunch and complained there was nothing to eat, so I found a large plastic platter and put the following treats on it:

A leftover BBQ sausage, thinly sliced

Two slices of leftover bread, buttered and cut into quarters

A diced kiwifruit

Four strawberries

A small piece of cheese, diced

1/4 tin corn kernels in a lettuce leaf

A muffin, cut in quarters

Four leftover chicken nuggets, cut in halves

A dob of cream cheese with a little corn relish mixed in

Four cucumber slices

Four cherry tomatoes

One Vita Wheat, halved

I gave the girls and myself a saucer each, plus a cocktail fork and everything was eaten and enjoyed. Now we often have 'platter parties' for meals and snacks. A novel way to serve up a meal when you have 'nothing' to eat!