Send a text saying Zavvi to 82100 and you will be entered into their Christmas competition to win something but don't know what lol and a code giving you £1 off anything, no minimum spend.

http://www.zavvi.com/home.dept

Quidco also available.

Zavvi Cashback rates

4%for Electronics, Computing, Games Consoles
5%for CDs
6%for DVD, Blu-ray, Books
7%for Games
15%for Lingerie, Health & Beauty
20%for Gifts