Do try Aldi and Lidl, even if you don't want to buy everything from there you can save. If you prefer to shop at Tescos/Sainsburys, do try their value/basics ranges. If you have certain products you always use, stock up on them if they're on offer.
Only have heating on when you really need. Check if it's worth changing energy supplier.
As mentioned in another discussions, do put bubble bath in soap dispensers - I've started doing this and my family haven't noticed!
Always take a drink and snack with you in case anyone is hungry, to avoid expensive buys.