Have a book swap with friends, family, at work, or find your nearest little library.
Use your leftovers for lunch the next day (ideas here).
List something you havenโt worn in ages on Vinted/Depop/eBay.
Cook a meal with everything that needs using up in your fridge or cupboards (ideas here).
Borrow or lend out a tool, gadget or DIY equipment.
Wash your clothes on a cooler setting.
Look through your old/spare cables to see if any can be recycled (find out how here).
Take a reusable bag to the shops.
Use your used coffee grounds in the garden or compost (find out how here).
Take a reusable cup next time you get a coffee, it might even save you money on your drink.
Join your local library or lending service, you might be surprised how many things you can borrow.
