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.

After reading every newsletter on this fantastic website, I decided to make changes to our household budget.

I started by rummaging through the cupboard, where I found an insulated plunger coffee mug that my husband and daughter had given me as a gift. The mug had never been used as I found it easier to grab a 'latte to go' on the way to work. I bought a tin of ground coffee beans for $6.65, figuring that this tin, with its plastic lid, could be refilled. I now keep this tin in the fridge at work. So, instead of buying three lattes a week at $3.50 each, I now allow myself one a week or sometimes just one a fortnight.

While buying my latte I would sometimes purchase an English muffin with bacon and egg. I now have muffins in the freezer, bacon rashers trimmed and have perfected the three minute poached egg. The bacon takes one minute in the microwave and the muffin is toasted in no time. If I am in a hurry, I wrap the bacon and egg muffin in a small piece of alfoil and take this to work. So instead of paying $14 per week, or $672 per year, I now buy the ingredients for the equivalent of $1.45 per week, saving just over $600 per year. Wow!

You have no idea of how proud I feel. I have saved so much money and it's thanks to your wonderful site.

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.

This super basic mince recipe saves me up to $100 a month on takeaways, thanks to the convenience of having meals already 'half made'.

All you need are:
2kg minced beef
2 cups of red lentils
2 tbsp of vegetable stock powder, or four vegetable stock cubes
1 tsp dried garlic granules
1 dsp dried onion flakes
4 cups of water.

Place all the ingredients into a crockpot and cook on high for two hours, stirring every 30 minutes. It should be thick, aromatic and an unattractive brown colour (don't let this worry you!).

One batch costs just $13 to make and is enough to serve as a base for seven meals for our family (two children and two adults). This saves heaps of money and time too. I usually freeze the mince in margarine tubs, as that seems to be the right amount for one meal for our family.

The meals I made are:

1. Piemaker pies.
   Allow one heaped tablespoon of basic mince per pie. Pour the mince into a small saucepan and add a large spoonful of gravy powder, or a dessertspoon of cornflour and some Vegemite for colour. Heat and stir until thickened. Spoon into pastry cases and cook in the piemaker.

2. Mexican enchiladas.
   I use Mountain Bread or make my own crepes. Lay the bread or crepes in u-shapes in a large baking dish. Mix the mince with an equal amount of tinned or home-made refried beans. Spread the mixture in a sausage shape down the middle of each crepe, fold each side of the crepe over, sprinkle with grated cheese and bake at 180C until the cheese is melted and bubbly. Serve on a bed of rice, topped with natural yoghurt and some salsa.

3. Stuffed capsicums.
   Halve enough capsicums for half or one per person. Spoon the mince straight into the capsicums, top with some mashed potato, pumpkin or sweet potato. Sprinkle with cheese and bake for 40 mins at 180C. Kids love these as the capsicum sweetens when baked.

4. Baked spuds with topping.
   Allow one potato of appropriate size per person. Cook in the microwave according to manufacturer's instructions. Split a cross in the top and pile filling into the opening. Top with natural yoghurt or sour cream and chopped, sauteed bacon. Allow one large tablespoon of filling per potato. Mix the filling with one tin of baked beans and heat in a small saucepan before pouring on to the potatoes.

5. Spring rolls.
   Mix about four tablespoons of mince mixture with a packet of cooked and cooled Two Minute Noodles, some shredded carrot, and 1/2 teaspoon Chinese five spice. Using filo pastry sheets or spring roll wrappers, fold a small handful of filling into each spring roll. Spray liberally with cooking spray and bake at 180C for 20-30 mins.

6. Greek pasta bake (Pastito).
   Heat a container of mince mixture with a 400g tin of peeled tomatoes. Cook enough macaroni for your family and drain well. Mix with the meat mixture and spoon into a large baking dish and top with your favourite white sauce or cheese sauce. Sprinkle on some grated cheese and bake for 40 minutes at 200C.

7. Shepherds pie.
   Add any vegetables of your choice to the mince mixture. Place into a baking dish and top with mashed potato, pumpkin or sweet potato then bake until heated and the potato browns.

I have decided I want a house which I can clean in minutes and I don't want any more energy or money draining clutter that makes it harder to control. The more I have the harder it is to control and the more motivation I need to contain it. 'Less is more' is my new mantra! I am applying this principle to my finances as well - when I buy too much it is such a burden and I don't have the motivation to stay on top of all the bills. Therefore, less is more - more energy, more money and more happiness!

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!

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!

For an outlay of $65 I purchased chemical-free ingredients to make shampoo, baby bubble bath, moisturiser, hand wash and washing liquid. I made 500ml shampoo, a litre of washing liquid, a litre of hand wash, a litre of beautiful light moisturiser and 500ml baby shampoo and bubble bath. All I added were essential oils and water to the ingredients and I still have enough ingredients to make several more litres of any product.

My next outlay for a further $50 was for packaging; containers and tubes to make shampoos, moisturisers and lip balms for Christmas gifts. I have saved myself a small fortune. There are several good websites offering these products, however, I found 'Aussie Soap Supplies' the best, which offers recipes as well. http://www.aussiesoapsupplies.com.au/

Renovations need not cost the earth. We just bought our first home and it had a hideous old kitchen with brown contact, broken stove elements and musty cupboards that had seen better days. We wanted a new kitchen but it was going to cost $4000. It was money we didn't have, so I used my brain instead and renovated our entire kitchen for under $100.

I bought:
Two bottles of oven cleaner at $3.99.
One second hand element from the dump for FREE!
Two tins of paint from Kmart for $17.99 and $36.99
Curtains that were faulty and discounted to $20 for two pairs.

I stripped off all the contact, cleaned the cupboards and painted the inside with flat acrylic paint. They are now white and clean inside. Then I cleaned the oven and fitted the element from the dump. It looks great. Now the oven will do us until we get that mortgage out of the way! I then removed the cupboard doors and gave them a coat of enamel paint. I took the door handles off, cleaned them with oven cleaner and refitted them - they came up like brand new! Finally I hung my bargain curtains and my new fresh, white kitchen looks lovely.

My husband was very impressed. All it took me was two days work and $82.96 of supplies. Best of all,I saved $3900 on a new kitchen.

I saved quite a lot of money today at the supermarket because I took along my own, personal List Supervisor!

Every week my five-year-old daughter, who loves to read and write, writes down our shopping list that I dictate to her. She then gets to be 'in charge' of the list at the supermarket and has the job of making sure we don't get anything that isn't 'on the list'! She takes her job very seriously (as five-year-olds do), and whenever I pick up an item that hasn't been written down she pipes up 'That's not on the list!' - and so I put it back! Even items that were treats for her are sent back to their place on the shelf as she exclaims 'Uh-ah Mummy, that's not on the list!'

There are many benefits to employing a List Supervisor - we save money every week, we don't buy as many unhealthy 'treats' and I don't have a bored, nagging child at the supermarket as she is too busy doing her 'important job'! It's a win/win situation for everyone!