If you live in the UK and shop at Tescos online here is a site which contains coupon codes for you to make some savings on your groceries etc.

http://www.tesco1.co.uk/

QUOTE
Tesco Voucher Codes

Welcome to Tesco Voucher Codes. This site will help you in collecting extra Clubcard Points, money discounts and special offers at Tesco.com.

Tesco Voucher Codes is regularly updated with the latest e-vouchers, codes and coupons for the Tesco site. As shown below, all the vouchers are regularly checked to ensure they are working.