I came across TopCashback about a year ago when I was looking to get AA membership and was trawling the internet for deals (as you do). The deal they then had netted me £40 cashback for my £99 membership which was by far the best deal that I could find at the time.
Since then just by going through their portal I have earned about £75 buying things that I was going to buy anyway from companies such as Halfords, GroupOn, Cadbury and Transpennine Express (train tickets).
It really is that simple, so if you are doing any internet shopping see what deals they have first, you could save without having to do anything!
If you sign up HERE you will also get a £5 Amazon voucher to get you started ! Money for nothing 🙂