Never carry cash in your wallet.
I think I'd say never carry *cards* in your wallet - it's much easier to spend more on a card than if you have to count out the pounds. I'm much more restrained if I go out debit- or credit-card-less!
8) Put 'envelope re-use labels' from charities, or use plain stickers to make the tons of pre-addressed envelopes you get in junk mail or within bills or whatever into blank envelopes you can use. I never buy new envelopes any more! I use re-use labels from Friends of the Earth, Baby Milk Action and Traidcraft. There will be other charities doing them too.
Be careful when converting points to Cineworld
...and it's essentially NO FEE
Via its Advent calendar (norm £59 delivered)