I try to go trough on willpower alone. i am always on edge that i get too reliant on "tools" (meds, earmuffs, sunglasses, whatever), to the point where i can't function without them; i delay that point as much as possible.
When i was younger, i used to take some quint-hydrogen-bi-carbon-hydroxide, but that was a slippery slope, so i quit doing that.