I usse my Nectar card which collects points from Sainsbury, Homebase and Spar petrol stations, then I used the points to exchange for things I want to buy from Argos (you can collect points there too as well as redeem them). Yes you get few points for the spend but it's better than a poke in the eye (as my dad used to say). Tesco vouchers are really good - depending on the state of the finances I either redeem them against my shop when they arrive (usually giving me a week's free shop) or redeem them against their points programme. We exchange ours for Café Rouge vouchers, £20 in Tesco vouchers redeems to £80 in Café Rouge, easily enough for a meal out when we have visitors. You have to be canny with how you change them but we find them useful. You can also use Tesco points against Open University course fees, they are really diverse!