We have been growing our own vegies, with quite some success, however we had a problem with white butterflies laying their eggs and producing green caterpillars which would attack our precious crop! I had heard that these butterflies were territorial so I came up with a brilliant solution to our problem. I made replica white butterflies,(out of waterproof ice-cream container lids) that were the same size as the real ones I then skewered them onto bamboo sticks and placed them in amongst my vegetables. Result: No more butterflies! It really works- I've watched them whilst having my tea break. As they fly over our garden they see there are already several there in our veggie patch, so they fly on over to the neighbours gardens! It sure is a cheaper and more environmentally-friendly solution than any other pest control I've heard of!

I only need to shop for food once a month and am saving $3000 per year on feeding our family of six.

With four children, I was spending at least $800 per month on shopping, so I came up with a plan to try and cut costs. I went through recipe books and chose meals that I was going to cook for dinner. I wrote a list on an A4 page for every day of that month and what I was going to cook for each day. Then, on another page I wrote all the food items that I needed for the recipes I had pre-chosen and that was my shopping list for the month.

The best thing is I now knew what I was cooking every day, without walking to the fridge and thinking 'what am I cooking?' I also put the A4 page of what we were having for dinner on the fridge and the family knew what we were having each day without asking me!

To start with I went shopping every fortnight for food, but now I do it once a month and only spend $550 each month.

Before I began this routine, I was spending $9600 per year on food for four children and two adults - now I am spending $6600 per year! The extra $3000 we save each year goes into our children's bank account, which they just love!

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.

Think twice before you buy an expensive bathroom cleaner to clean your acrylic bath, vanity basin and laundry tub. Try Sunlight soap - it works wonders!

After recently having a dint repaired in my three-year-old acrylic bath (the kids were too rough with their bath toys!), I asked a man who repairs acrylic baths, basins, and so on what the best cleaning product was to use on this surface. I was amazed to hear that good old Sunlight soap was the best. He said most of the marketed products available eventually wear the surface and take off the shine, then people have to pay him hundreds of dollars to get that shine back again!

I decided to try it for myself. I purchased a pack of Sunlight soap (four in a pack) for $2.09 at Coles (with even cheaper generic brands available). One cake of soap lasted me for six months - that's just over $0.50c for six months of cleaning the bath, vanity basin and laundry tub. Best of all, it really works! Also, it leaves a wonderful shine; I was really impressed. I use an old sports sock over my hand and foam up the soap, then I clean away - all that soap scum and grime easily vanishes.

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!

My kids love doing things on Saturdays but even a trip to the movies for our family costs $70. So I invented '$20 Saturday'. We could go anywhere and do anything as long as it didn't cost more than $20 for the whole day. One Saturday each month we would find a spot in the street directory that looked interesting and take a picnic, other times we visited free places such as museums or community festivals and the $20 bought a drink, small snack or ice cream. Not every place was terrific but we gave each place or activity a score to rate whether we would like to do it again. My boys talk fondly of things we did together and places we visited on $20 Saturdays and they learn that you don't have to spend up big to have fun.

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 can make four litres of handwashing gel soap for under $1.00! To make your own liquid gel soap, grate a bar of Sunlight or generic laundry soap into a two litre ice cream container. Pour boiling water to half fill the container and mix to dissolve the soap. Carefully fill to the top with boiling water and mix well. Pour half the mixture into another two litre container and top up both with boiling water again. The gel is very thick once it sets, but a good consistency for its purpose. Store in the two litre containers and refill pump bottles as needed. One pump is all it needs to clean your hands and can even wash dirty dishes if you squirt into the sink!

I came up with a great low cost, low stress way to feed the crowds at my son's 21st birthday party. With the weather being chillier, the food needed to be warming and more robust than usual. I came up with the idea of a crockpot party! I am borrowing family members' and friends' crockpots and am filling them in the morning with different dishes, then I can 'forget' about them until the evening! When it's time for everyone to eat, I can then just plug them all into a power board and put them on the table. This is a triple whammy saver for me! It saves time as I don't have to spend all day in the kitchen and can get other things ready for the party instead. It saves money as I can use cheaper cuts of meat to achieve tender dishes and - as I don't have to use serving dishes, it even saves on washing up!

I recently noticed my elderly neighbour was unwell and no longer able to drive or leave the house; relying on taxi services to deliver food (often expensive pre-packaged items), or he would have home delivered takeaways. Being a fussy eater, he was reluctant to consider 'Meals on Wheels', so I volunteered to shop for him and cook him three different meals a week. Each week he gives me enough money to cover the costs of his meals (soups/stews/freezable casseroles) and I make up bulk amounts of each dish. I deliver half to him and keep half for myself, as suggested by him for payment. Not only is he saving money on taxis and home delivery, but he is eating healthy food and my family is also provided with three meals a week as a bonus for giving up a little of my time. Often cooking for one is not inviting, but cooking for others encourages healthier eating habits and helps regain social contact. Often a lonely person will gain a new lease on life to boot. A great savings all round, and using recipes from the Vault saves me even more!