Minimise buying presents for friends. I don't buy birthday presents for friends any more except for special birthdays. Saves a lot of time and effort too.
Use reusable things - lots of kitchen stuff can be avoided entirely e.g. replace cling film with tupperware, foil with silicone baking sheets, kitchen roll with tea towels. Buy detergent as supermarket own brand boxed powder, not the fancy tab things. Reusable nappies, wipes and menstrual products also save money long term. You could even use family cloth if you wanted to cut down on toilet paper...
Avoid bulk buys, multipacks, and discounts often you end up buying more than you actually need and you don't save money that way.
Shop in charity shops and if you have kids, nearly new sales. I get some lovely quality stuff from very good brands in nearly new sales.
Think "do I need this?" before buying new clothes, shoes etc and buy better quality when you do so that it lasts longer. Take care of more expensive clothes by washing them at 30 and on delicate washes, inside out. Avoid using the tumble dryer.