2) Follow a consistent schedule. 3) Follow a consistent routine to prepare for sleep. 3a) Turn off screens well before bed. 4) Learn and follow relaxation/self-hypnosis scripts.
I've learned a lot about sleep from observing my baby daughter. Good sleep is easiest on top of good sleep; a tired brain usually has more, not less, trouble falling asleep. If my daughter misses her nap, she is more hyper and harder to settle down at bedtime. If she gets a nice long nap, she also is calmer at bedtime and falls asleep more easily.
I've had terrible sleep habits most of my life, and it's only now that I'm a parent that I can appreciate how powerful a consistent schedule and routine can be.
Coffee is such a short term fix with implications for the rest of the night.
The best thing is that I actually sleep same amount, but am better rested. Perhaps it's not the same for everyone, but I feel more people should try it. Caffeine is the nicotine of our era.