Sock it to draughts with cheap 'door snakes'

With every winter, it's important to make our heating systems as efficient as possible. Draughts under doors (both to outside and to rooms not currently being used) let heat escape, driving heating costs up. Door snakes are often advertised at around $10 each. This means for a whole house you may be looking close to $100. Instead, you can use a pair of men's long, knee-high socks! These can be filled with rice (or sand if you have easy access to it). Either tie a knot or see the top to seal. You can purchase ind the socks at cheap shops or ok shops, use the cheapest rice you can buy and you can make a house-full for less than the price of one commercially produced door snake.

Make your own nut butters for a fraction of shop prices

I save a fortune on buying nut butters by making my own. Almond butter, cashew butter and good quality peanut butter can be fairly expensive to buy so instead I buy roasted almonds for about $4 at a bulk supplier (Bin Inn if you're in NZ) and blend it in my Nutribullet with the addition of a smidgeon of olive oil. This gives me twice the quantity of a shop-bought jar which would cost at least $12! You can also add a little honey or chia seeds to add variety. I use the same method to make cashew butter. I simply buy 200g of cashews for $4.80 from an Indian grocer, roast them in the oven and blend them with the addition of a little olive oil to start the process. At around $15 a jar to buy at health food stores, this is a terrific saving!

Big savings on seeds

We have saved over $150 in seeds alone this past year. Instead of paying up to $5.00 for packets of seeds which may or may not sprout, we have started grabbing packets of seeds from the herb sections of Woolworths, Coles and IGA. Most mustard, coriander, fennel, cardamom or celery whole seeds that you get as a spice for cooking will sprout for you in your garden. These normally cost around $1.05 per packet and you will get a lot more seeds than if you bought them from a gardening shop. We also get the full dried peas (not freeze dried) from the soup section and have planted these successfully for three years now. They give us the sweetest sugar snap peas ever! A packet normally costs $1.53 and you get close to 100 seeds. In comparison to buy 'packet' seeds it would cost you over $12.

We also cut the ends off shallots and replant them, it takes about three weeks before they start to recover, but then you have an endless harvest of shallot leaves to use in salads. We do the same with old onions that have hidden themselves away in our cupboards and have sprouted. Plant them in your garden, let them go to seed and you will have a great seed stock for the next few years. No need to buy more!

Garlic can be done in the same way. Grab a clove and plant it flat end into the ground. After about four months you will get a great bulb of garlic from your original clove. Be aware that garlic from China or Mexico has been treated with Bromide (cancer causing agent) so only use Australian grown garlic.

Old potatoes and sweet potatoes that start sprouting can be replanted and will give a good yield. Just cut a 3cm piece around the sprouting part of the potato and plant it, from one potato alone you could get up to seven new plants.

Pumpkin, cucumber, capsicum and other vegetable seeds can be cleaned, dried and then planted out to give you more seed stock to play with. Try planting two different types of pumpkins near each other and you might get a hybrid created which tastes great. Our family had a butternut mix with a jap pumpkin and it was the sweetest tasting pumpkin we'd ever tried. We also let one or two of each vegetable go to seed so that next years planting will cost us even less. Our goal is to go totally self sufficient in the garden. So far we have an abundance of butter lettuce, silverbeet, rocket, mint, corn, tomatoes and sugar snap peas all from previously saved seeds.

A Challenge for life

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.