Serenity Now -- retiring and rising at the same time every day is a basic tenet of Chinese medicine, so good on you to have reached that understanding on your own!
Another thing that helps people with insomnia or wakefulness is to reserve the bed exclusively for sleeping (okay, okay, sex, too). No tv or reading or, heaven forfend, working in bed. That teaches your body that bed is the place to relax and sleep. Also, no "screens" for at least an hour before bed -- no email, no internet, no tv, no smartphone.
Also, creating the bedroom as a dark and silent place is important. I use a tempurpedic sleep mask. It's expensive but it works way better than any other sleep mask that I've tried. I'm now at a point where putting on the mask signals my body to shut down and sleep. So that takes care of light. Noise is harder. I live in the city and there are bus lines that run on my street. I have a white noise machine that helps a lot and even when there's no significant noise, if I have trouble falling asleep, the "ocean" sound on the machine can lull me into sleep pretty well.
UC caused me to quit drinking coffee and that's been a real boon for me. I wake up way more refreshed now than I used to when I depended on coffee to get me going. Sometimes I really miss it, but the drawbacks are really much greater than the benefits for me.
And, as you noted, for me, the biggest single factor in being able to sleep through the night is exercise. Really hard exercise on a regular basis does wonders for every aspect of my life. Every aspect. I feel like superwoman even when I'm the slowest person on a group run.