Yes: Hydration is a little important. Sleep is very important (white noise machine, blackout curtains, melatonin when needed, regular schedule, no alcohol near bedtime on work nights.) Exercise is a little important, but too much is detrimental. Learning meditation, specifically body-scan, was really helpful for me though indirectly. It helped me better notice my internal states, which then helps me remove blockers to focusing. A low-carb diet also helped, but is rather high-effort to maintain so I don't follow it anymore. I make great use of reminders on my phone, and appointments on my calendar, because I have no faith in my ability to remember things at the right times despite having a great memory.