Morrisons are our regular shop these days, they have incentives like £10 of your shop on week 4 if you spend so much on weeks 1-3. I have a Tesco credit card which builds up points on shopping anywhere so some months I get my shopping free at Tesco, if I've built up enough vouchers. The vouchers are very good value if you exchange them for days out or clothing or electrical vouchers. I've just got some nice Pyrex dishes from there for 60% off, using the tokens they were giving away last month.