Pack away winter / summer clothes so that when spring and autumn come you unpack new clothes and it feels like you've got a new wardrobe, people compliment you on your new clothes etc. Reduces the feeling of boredom and wanting new stuff.
Get on offer bread and keep it in the freezer for toast for the kids or yourself if you're still young enough to look bread without putting on half a stone.
Buy frozen berries for smoothies or deserts.
Make blackberry jam in autumn.
If you have sliced meat in sandwiches Buy your own and cook it rather than overpriced packs of chicken or ham.
Regrow your lettuces - chop the bottom off a little gem and put it in water and it will regrow. Or just grow lettuce leaves from seed.
Use your freezer a lot, freeze batch meals like spag bol, curry and soup. Freeze left over fresh herbs in ice cube trays with oil - or grow your own herbs from seed so.you can just use what you need.
Think about what you can repair / refurbish to save buying new. E.g turn old jeans into denim shorts. If you can sewing, adapt or alter clothes.
Make diy greetings cards and edible gifts like fudge or biscuits, or even home made soap or candles. Wrap in a cellophane bag with some ribbon. Rather than having to shell out £3 on a shop card, £2 - £3 on a gift bag, £12 on wine and £6 on chocolates for example which you could easily do going to visit someone in their new home / new baby / birthday / dinner party etc.
Cancel gym memberships and buy weights to use at home - get cheap used from market place.