This is not going to be a very exciting answer. If I were a better person than I am, I would say something like meditation or reading, or walking. But the truthful answer is that I come home, recline in the recliner, and surf the Internet on my phone. I kill time in the most prosaic way possible.

I am a voracious reader of minutiae. It comes from wanting to absorb information and having a short attention span. So I binge-read Wikipedia, science websites, and Quora, looking for things to learn. I also like to read advice columns, because I like to know the right things to do in an awkward situation.
Sometimes I fall asleep in the recliner. I guess this is how one really winds down.