While you might have factored in your hair and makeup (or asked a bridesmaid to help), you'll still probably get your nails done, get your legs waxed, and perhaps even get a facial before the big day. Put aside £50-£100 for this depending on your usual regimen. You could argue that you'd get these done anyway, but you're likely to go for more expensive treatments (or add extras, like eyelash extensions or a spray tan), so make sure they're on your list anyway.