>>2863525Fill the void left with something else. Running, lifting, studying a particular subject...these can fill the void left by quitting, and can keep the mind from falling back into old patterns of thinking. If you keep focussed on the positive, there is no room for anything else.
Obviously, this takes effort and discipline and sounds easier than it is. But if you apply yourself, this will work. Don't think "don't do this". Think on what you will do instead.