The trick is to take the least sugar possible as soon as you use. Eat meat focus on a solid base for food. meat cheese eggs, that kind of things. No bread, no soda (sugar..)
Observe how your body react when you eat no sugar at all as soon as you start to use
And eat meat, you know, something consistent that has no carb (no wheat no bread no rice, no corn, no flour)
I eat Ground beef as a base (better if you varry), because it can be eaten fast and with sauce, like tomato sauce(add water, you will have more fun eating your sauce) You can make a good spaghetti sauce (your ground beef + sauce + water + cheese + spices like worshestershire sauce, olives, olives are great in that sauce) and eat it just like that, or chicken also :same process , bechamel sauce, you add more milk and with cheese etc
On meth you will find that eating something that is .hydrated. is better than not
THIS will prevent you from jittering, mouth clenching etc, all the troubles, gone. (You attack the jitters with ground grease lol for real)