I hesitate to write this because it sounds off. But sometimes, I try to turn off my excessive analytical thinking and put myself into... I don't know what to call it. "Trancelike" is what I'm going to use, but it's wrong. There's no word for it.
It's like, the mind is hit with a flow of thoughts and impulses. I'm sure your mind works at least a little differently than my own, but I often start analyzing and deconstructing all the thoughts, analyzing, thinking, pondering.
Sometimes I want that to go away. Drugs can do that -- I've done it with both recreational and performance drugs in times past -- but that's not what I'm talking about.
Even over and beyond that, I think a lot of drug use is a placebo.
I use "drug" broadly -- slammed a couple energy drinks in a row, lots of coffee, or liquor all can be used partially to induce this sort of work. But the chemical effects of these substances shouldn't take effect for at least a while as they metabolize. Slamming two big energy drinks in a row shouldn't have a dramatic effect on your consciousness, beyond just letting you make your own mental associations with the energy-drink-emboldened state of mind.