you need to create a set routine or ritual that frees your mind of such constraints
ie:
-weigh set amount and prepare it in your piece
-put on light music, meditate, or read a psychedlic essay by someone like McKenna, watts, whoever you can relate most with to better calm your mood
after you finish your ritual don't even think about hitting the bowl, just pick it up like clockwork and do exactly what you set out to do
it's simple habits like these that create an everlasting reward system within your brain
you've been programmed your whole life to think certain thoughts a certain way at certain times, sometimes i feel like you can tell who has been muting the commercials they're whole life and who has not
reprogramming yourself can be just as easy