Diet fatty.

You need to be stable mentally and emotionally throughout the day. Having energy spikes (like a sugar rush) throughout the day will only hinder you.

Get off the quick burning energy sources namely sugar and carbs.

Replace with the slow burning energy that is fat, tons of veggies and good protein.

Fruits have loads of sugar stay away, careful with some veggies as well like carrots.

Avocados are a god damn super food. Good clean fat and potassium.

Deadass cut out sugar and carbs for (insert a doable goal) I'd say at least 5 days minimum. And see how you feel.

I consider most add kids as one or both of the following categories.

Shit diet, and or no self control.

Getting your diet in order takes care of both things at once. Then apply the self control to other areas.