We're trying to cut back.
Up until now we've just spent whatever we want on food, but am trying to stick to a budget of £70 pw. When I'm shopping I count it up roughly as I go along and mentally think are there cheaper options. If I start getting nearer the £70 mark, I might change a cake for some value biscuits, change wine for bottle of cider, ie the cheaper acceptable item. Tescos often have our cereals, cleaning products on offer so I only buy them on offer, and I always go for their own brand or value products if I can as I don't notice the difference. If you like wine, my husband recently bought a pack to make some homemade wine. I was a bit dubious but it's not too bad and doesn't leave you with a hangover - we got 5.5 bottles for approx. £12.50.
We moved house in the summer, so when we have a good idea of gas and electric here, we'll look into the question of another supplier.
We've tided in with BT until April, but have worked out we can take out the same package with TalkTalk which will be cheaper in the long run, ie once we've got past any new customer offer.
We've all got bikes, so a few times recently have been on a bike ride and taken a picnic or stopped off at pub for a drink which works out much cheaper than going into a tourist attraction and petrol.
Don't just buy clothes because you fancy treating yourself, do you actually need them? If you buy clothes or goods online, is there a promotional code available?
When buying presents, most of us tend to feel we need to buy a little extra or make up the present to a certain value, but the main thing is to give someone something you really think they will like/need.
As said, you can get books from the library for free of buy cheaply in a charity shop.
I agree, don't cut back unless you can live happily without it (unless you really do need to cut back a massive amount).