I have a baby who likes to wake up at 6AM, so don't really have luxury to work on side projects every night.
Wife and I like to watch some TV before going to bed. Sure I could do a bit of programming during this time but got to prioritize relationships over hobbies/projects. Usually we are watching a new show but after that we will play The Office because we have seen it enough that we don't really pay attention to it. It is kind of nice to fall sleep with some background TV noise. Like white noise machine in baby's room.
Also it might be strange but I find it easier to fall sleep to TV than complete silence.
I endlessly swipe my phone trying to find something that makes me fall asleep. As I do this, I meditate upon why this is a terrible idea, but continue doing it anyway.
Play the Ludo board game (on an actual board) [0] with my wife, talking about how our day went while nice music plays in the background. [1]. I know this is old school, but it's fun!!!
Otherwise, watching The Office 100th time.
Or if really not sleepy, then working on my next side project idea. Most likely the excitement of that new idea is keeping me from sleeping.