I had my £134 cash back for disney paid about 10 weeks after booking - have only paid a deposit so far!
I also order the work ink cartridges via there and all my train tickets for work.
I am also doing the snap deals trial where I got 30p cashback just for buying a cucumber!
I have made £300 odd in the last year - better than nothing!
I also walk into random shops in town to 'check-in' and earn an extra 20p here and there! (Note there is a time between check-ins enforced so you cant just go from shop to shop - i know - i tried!!)