1. Pacing and rest.
2. Darkness therapy to keep my sleep pattern in the right place and generally improve my sleep quality.
3. Powdered mix I put into herbal tea of low-sodium salt, D-ribose, acetyl L-carnitine, magnesium citrate, and magnesium ascorbate. I'm reasonably sure that most of those are helping a certain amount, but it's always really hard to tell, and I occasionally tweak the proportions.