I have a set amount per week for food and don't go over it and also shop for bargains if on offer. I keep heating to a minimum, subscribe only to associations I get anything out of i.e. U3A, use my bus pass whenever possible, try not to buy unnecessary clothing and mix and match what I have, borrow books from the library, cook from scratch with set meal plan, put washing machine on eco and only wash on a full load, and so it goes on. It is also well worth popping into your high street bank/building society to find the best interest rates on savings accounts, going out with friends who accept you as being thrifty and don't laugh at you because you don't eat/drink heavily, not smoke etc. It is a lifestyle rather than a penance for me as it feeds into my good health and is also good for the planet.