Thinking keeps me awake. It's getting worse as I get older. Maybe it's anxiety or something related, and sometimes it's worried thoughts, but often it's just running through scenarios. Video games, media plots, what I need to do next week. My brain is far more active after 10pm, and I am personally more motivated. I get a burst of energy but it's not really the right time to clean the house so lying in bed has it all…
I'm exactly the same, only I've done it ever since I was very little and it simply never went away (I'm in my early 20s now). Usually I'm awake in my bed for at least an hour. Sometimes two. I just really can't stop thinking. It's not anxiety in my case. Any people here who were in a similar situation and were able to get rid of it, or make significant improvement?
The biggest one for me was physical exercise. Working out hard for 1-3 hours after work (most people can't put in 3 hours, I know) left me sufficiently physically exhausted that whatever mentally engaging activities I got into later, I was crashing by midnight no matter what. Doing this after work was also critical as it helped create a clean break from work (where many stressful or technically engaging thoughts come from for me). Exercising in the morning did not have the same effect.