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!

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.

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!

School holidays are more affordable with the help of the $21 Challenge! Money seems to slip away so effortlessly while out having fun with my teenage kids. Budgeting is something I am trying to teach them about but it is hard to make it relevant sometimes. Then I had a great idea that would make them pro-active with the weekly budget over the holidays, without me being a 'budget nag'.

It is the $21 Challenge week, with a twist. THEY have to go and log all the food in the freezer and pantry, and make up the meal plan for the week. Then all the money THEY save us for the week can go towards some guilt-free fun. It's a great incentive and my kids are learning important household skills.

Instead of adding up when you do your shopping, why not deduct? This hint explains all.

I no longer use a calculator when I do my grocery shopping. Something to do with always pressing the wrong button and clearing my calculations!

Now, I simply write how much I can spend on my shopping list and when I put something in my shopping cart, I subtract a rounded amount from the total. For example, if I have $100 to spend and I buy milk for $3.89, I subtract $4.00, leaving me a total of $96 to spend on the rest of my groceries.

By making these deductions with every item, you always know how much you have left to spend. Makes it easier to budget and certainly beats using a calculator!

I make home-made yoghurt in my EasiYo maker for as little as $0.50c per kilo. You don't need to buy the special sachets, all you need is milk powder and a couple of tablespoons of plain yoghurt. I just use 1 and 1/3 cups of milk powder and two heaped tablespoons of yoghurt (saved from the last batch). Easy, cheap and delicious!

I make these Cheesy Ham and Corn muffins, which are delicious and at only $0.44 each to make, give me and my family something tasty, cheap and healthy in our lunchboxes. They are yummy cold, or heated up in the microwave.

Makes 12

Ingredients:
1 x 310g can of corn (reserve can for measuring)
½ cup reduced fat milk (1/2 ‘can’)
2 eggs
2 cups of self raising flour - I use wholemeal (2 ‘cans’)
Pinch of salt
2 cups reduced fat grated Australian cheese (2 ‘cans’)
2 slices ham, cut into strips
2 teaspoons English mustard

Method:

Whisk together corn, milk and eggs in a large bowl until combined. Add remaining ingredients and stir until just combined.
Spoon mixture into non-stick ½ cup muffin tray.
Bake at 200c for 15-20 minutes or until golden brown and cooked through.

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.

As a new member, I have saved $150 in my first week, thanks to the $21 Challenge! I thought I was careful with money until I discovered this site and realised how I could further improve my spending habits. I decided to give the $21 Challenge a go and it is now Thursday and I haven't been to the shops yet!

I have become a problem solver due to the fact that I must use what is in the fridge/freezer and pantry. I nearly buckled when my four year old wanted 'pink milk' and I had run out of Nestle Quick but no problem in the end. I found some rose pink food colouring and with just one drop - presto, pink milk! It does take some preparation because you are cooking from scratch but it is all worth it when your family tells you that the dinner you made tonight was the best, and is there any more?

My other dilemma was to use the three zucchinis in the crisper, so I made them into a slice. It was so easy to make and I had every ingredient on hand without even trying!

Zucchini Slice (serves 4-6)

3 zucchini (grated)
1 onion (grated)
1 potato (grated)
4 slices of ham/bacon (chopped)
1 cup of cheese (grated)
6 tablespoons flour (plain)
3 eggs
salt/pepper

Put all ingredients into a big bowl and mix really well. Pour into a quiche dish and cook in the oven for one hour at 160C. If you are vegetarian, simply leave out the ham. Simple, delicious and super cheap!

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.