1) Get all your moneys into a big ISA account and start saving today!!
2) Buy more generic food from stores. I find Asda Smart Price bread to be really nice toasted, better than most leading brands, need I say. I even buy thier cheap-o Cola I used to hate. Drink water (it's almost free). Frozen and tinned goods keep longer.
3) Watch out for reductions, stores like Asda reduce foods to sell before they expire - take advantage.
4) Electirc, use less of it. Try turning the fridge down on the thermo and keep it more shut.
5) Bulk buy more items.
6) When it comes to clothes you can buy off-season clothes or buy cheaper clothes from George, Primark, Peacocks, Matalan.
7) Try deal sites like HotdealsUK (use the RSS too) and keep upto date with what cheap offers are worth it.
8) Car? wouldn't bother, tax, mot, repairs, gas and insurance ... walk more and bike more which brings me onto the next:
9) Better health. = less doctors and a happier life.
10) Spend less when you are out too, insted of fast food, come home and eat cheaper.
11) Keep an eye on your money and savings. Make realistic targets.
12) Get a job (easier said than done)