Get some money back when you shop online by clicking through to retailers on cashback websites. Unfortunately, the small catch is that you can only request payouts once you have a certain amount in your account, which means you need to spend enough to get it.
However, it's a worthwhile thing to do if you shop online regularly. Here are the ones I use most regularly.
(TIP: always use the same email address on the cashback sites as you do on the retailer sites, otherwise it won't match you up to receive the cashback)
MUTUAL POINTSWhat you do: This is my favourite one. Shop online and get cashback, usually ranging from 1-5%, they support pretty much every retailer you can think of - apart from Amazon, unfortunately! You can also sign up to receive up to 3 emails per day - typically, you get 5 points every time you click a link in the emails, or you can earn extra points by registering on websites, downloading software, etc. Not only that, but they also now support a small selection of high street shops like Superdrug, so it's not all online shopping!
What you get: 3000 points gives you £20. You also get 50 points when you sign up
Minimum payout: 3000 points (£20)
Website: MutualPoints.com
NECTARWhat you do: One of the most popular cashback programs in the UK as it's highly affiliated with Sainsbury's and BP petrol stations. They've branched out and you can now earn cashback on LOADS of different websites. I use it mostly for eBay and Amazon, since MutualPoints doesn't cover those two. :P They also occasionally send you feedback surveys or you can install their toolbar, etc etc etc, for extra points.
What you get: I think 500 points = £2.50? It's not amazing but worth it for the fact I buy so many gifts on Amazon et al.
Minimum payout: They have a whoooooole range of options for rewards.
Website: Nectar.com
PIGSBACKWhat you do: Shop online, complete offers, enter competitions and all sorts. I must admit I don't use it, I'm only mentioning it because it seems to be one of the most popular cashback sites.
What you get: 100 PiggyPoints on registration, cashback on all sorts of things. However, even if you don't want to use it, do sign up because your registration bonus of 100 PiggyPoints can be redeemed for a £1 donation to charity.
Minimum payout: 100 PiggyPoints, there are a whole load of rewards available.
Website: PigsBack.com
Some other websites that offer good deals (but that I haven't really tried) are TrolleyCash, TopCashBack, Quidco, FreeFivers and MoneyBackMadness.