It's important to regularly check your account details on each cashback site, especially your bank account details. It can take up to 60 days to get your cash so you don't want further delays or inconvenience sorting out issues.
Don't be led by what the cashback sites have to offer. When you've found the best deal for the item you are shopping for, then use the search box to find out which cashback sites offer the best deal.
Wait until you have the money in your account before you spend it! It can take a long time for the money to come through and occasionally the retailer doesn't pay out.
Since there tends to be a threshold you need to reach before the sites pay out (usually around £20), make sure you weigh up getting the best cashback (by signing up to several cashback sites) with reaching the threshold to get your money.
Pretty much every cashback site requires the use of cookies to ensure they can track your purchases and credit you with the cashback correctly. Make sure cookies are enabled on your browser of choice - most cashback sites have a cookie test you can use to make sure you're set up correctly.
Cashback Guardian checks each site that you visit and alerts you if there are cashback offers available. This means you need never miss another cashback offer again!