This one’s simple, but surprisingly effective. Just pick a day of the week to keep your cash in your pocket. If you want to get the most out of this, choose the day you’d normally expect to spend the most (on non-essentials, of course. Don’t starve yourself).
If you’re finding it tricky not to open your wallet, try cutting down on your mobile screen-time so you’re not peppered with adverts all day. Other easy tricks include swapping out your usual weekend nonsense for free local activities in walking or cycling distance. Don’t cheat yourself out of too much fun, obviously. Getting the balance right is the key to staying on track.