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 held a very successful and inexpensive party for my daughter and her 12-year-old friends by doing my own version of the 'Amazing Race'! When sending out invitations, each person was allocated a team colour and asked to wear clothing in that colour. On arrival they were given a back pack containing water bottles, maps of the town (we live in a small town and had all activities within a few blocks of home) dry biscuits to snack on, a list and bag for a scavenger hunt to find things on their travels, a dictionary, sunscreen and their first clue.

I had friends in the area lined up with different tasks to be completed (these included windows to be washed, shooting a set amount of goals at a basketball court, sorting books into alphabetical order, separating peas and corn with chopsticks and many other easy to prepare tasks). Each team had a passport to be stamped when each task was completed and the next clue was handed over at each destination. For the final clue, they had to use the dictionary to work out the coded directions to their final destination - our local swimming pool where they spent a couple of hours playing around before heading back to our place for the party food!

This party really didn't take much to organise once I got into it; just a few friends willing to give up a little time for each task and some imagination. I used items from home to make up the challenges, such as books, jigsaws, basketballs and frozen vegies. It was talked about for weeks afterwards and I used photos from the day to make a photo slide show, which I burnt onto discs for everyone who came!

One year a friend gave me a money tin and on the side of it was printed, 'If you fill this tin with only gold coins by the time it's full you will have at least $500'. It really didn't look big enough to hold that amount of money, but I love a challenge so I decided to find out if it could!

We started in March and any gold coins we had went into the tin. Our goal was to open the tin at Christmas and use it to pay off lay-bys plus have some spending money over the Christmas break.

November rolled around and the tin wasn't quite full. However, when we opened it up and counted our 'gold' we were very surprised and extremely happy to discover we had collected $700 in our little tin!

Because of that little treasure chest of gold we enjoyed a fantastic stress-free Christmas! I was able to pay for all the presents for our immediate and extended family as well as cater for a great Christmas day feast, AND we had spending money left over for the holidays.

Now it's a family tradition. My sceptical husband happily donates all his gold coins to the tin and my 12-year-old will go hunting for gold coins just to add them to the collection! I know that I don't have to worry about the financial strain of Christmas any more as my tin has got it covered.

I had moved into a home with an old kitchen and the stovetop needed a really good clean. I tried everything to shift the baked on grease from the rings that surrounded the coil hotplates but to no avail.

My friend suggested removing the rings and soaking them in Napisan and hot water. I actually used a generic brand nappy cleaner and it worked just as well. To my utter surprise, it removed what must have been 20 years of baked on grease. The stove looks brand new! I then did the same with the grill and oven racks, and they too came up sparkling and shiny.

For maintenance, some vinegar in a spray bottle cuts through any grease or grime left on a stovetop after cooking. But beware of vinegar on or near marble, as it eats right through it!

I thought this hint would be particularly useful for anyone moving into a rental property or having to clean their rental property before they move out. You'll save on cleaning products and get your bond back! And don't throw out pots and pans covered with grease or grime. Give them a Napisan treatment and save dollars.

My husband and I have began saving up to $30 per week on our grocery bill since we invented 'Grandma's Day!' When we go to the supermarket we ask ourselves, 'would Grandma have been able to buy this item in her day 60+ years ago?' If the answer is no, then we decide we don't need to buy it either! This saves us money on a whole range of items such as fancy dips, designer coffees and biscuits. We used to pay over $3 for a pack of 10 biscuits, now I can make 12 biscuits for around $1. Using plain yoghurt as a base we are even making our own dips; there are so many websites with great dip ideas. Now we are saving valuable money and our waistlines too!

My husband and I have finally found the key to successful saving! The two of us are dreadful savers; while we're good at putting spare change in a jar, we don't know what to do with it once the jar is full! We thought a saving thermometer would be helpful, but wanted something that wouldn't be so obvious when people came over to visit. So we came up with a more subtle brainwave - a jigsaw puzzle!

We bought a jigsaw of what we wanted (a house) and assigned a dollar amount to every piece. Now we 'buy' pieces of the jigsaw puzzle, the money goes in our jar and we bank the money once a month. We even set up challenges for ourselves, such as who 'buys' the most pieces in a month, and we never have to worry about what to buy each other for presents - we buy pieces of the puzzle of course! Once we've completed the puzzle we're going to hang it on the wall - of our new house!

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!

For a great-tasting, quick, healthy and inexpensive breakfast, make your own egg McMuffins.

Fry six eggs, using egg rings, (if you don't have any, check your local discount store), fry bacon if you wish, and toast your muffins. Once all ingredients are cooked, assemble egg McMuffins, including sliced cheese and bacon if you like.

Once assembled, wrap each muffin in alfoil and freeze. In the morning, simply take the muffin from the freezer and cook in a moderate oven for 20 minutes. For an even quicker breakfast, unwrap from alfoil and wrap in paper-towel. Place in microwave for at least one minute, depending on microwave.

My kids love these for breakfast, and they only cost around $0.60c each!

I buy Home Brand English Muffins which are around $1.60.

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.

We had the chance to travel overseas several years ago but had to save $1000 to make it happen. On one income with two small children it seemed impossible. Then I had the brainwave - I didn't have to save $1000, I had to save $1.00 a thousand times! This was so much easier - a generic brand product at the grocery store, a chocolate bar at the petrol station and so on, soon added up and the savings contributed to a great family holiday.