I had issues with sleeping when others do for a long while. I do not anymore (although get out of sync again about 2x a year). 1. Caffeine and you: You have a certain sensitivity to this drug. You may also be misusing it. Generally speaking, it's a late morning, early afternoon only drug. Late morning is the only place it starts working as its an adenosine antagonist, and you don't start getting adenosine in any real…
I stick to the rules for caffeine consumption, except I can always go for decaf in the evening.
I've been using Flux on my computers, I think that also helps.
Finally I just set a timer now when I go to bed. Usually 7.5 hours sleep plus 12 minutes to fall asleep is perfect for me, so when that timer goes I actually feel like getting up. And also if I wake up earlier I never stress about what the time is because I know I'm still on the countdown.