LPT: keep a consistent sleep and wake time
Keep a consistent sleep and wake time, even on weekends and vacation. Consistency is key. Then take a walk in the sunshine without sunglasses every morning to anchor your circadian rhythm. No naps late in the day. If you do, 20 minute power naps in the afternoon are fine, but not late and not long. No screens within 1-2 hours of sleep time. No screens within the first 30 minutes of waking. Then do your deep focus work within a few hours of waking. Again, consistency is key.
You’ll be sleeping so well in no time