Probably the same as changing any behavior: First try to notice when you're doing the thing you don't want to be doing, then try to abort when you find yourself

Probably the same as changing any behavior: First try to notice when you're doing the thing you don't want to be doing, then try to abort when you find yourself doing it. The time between "start" and "abort" will keep getting shorter, and eventually you'll not do it in the first place.