The next time you have urge to play video game (for example), don’t try to force yourself into not playing it...
...INSTEAD TRY THIS:
you just choose a game that is still fun but just a little bit less fun than the one you would normally play.
The same you do for other fixes like food, videos and porn.
It's totally ok if you don't succeed every time...
But when you do, this works like magic because: