Your brain needs rest and distraction, both for professional health and general health.
If I worked, say, 8 hours a day, and then added in your three hour commute every day, that would be borderline death march.
Besides all the utilitarian suggestions, you could consider something unrelated to your work or profession, at least part of the time.
I sing. I put a couple hundred singable (by me) songs on a usb stick, and play them. When I land on one that I want to learn, I put it on repeat, and learn it.
I didn't used to be able to sing, from lack of singing at all and self-consciousness. I didn't used to even sing in the car alone, I was that self-conscious. Now I've improved (my voice has been complemented, singing and not), and I've sung songs among friends and co-workers.
Sometimes I don't sing, and think about something at work or elsewhere. It's not all or nothing.
Maybe listen to old radio shows like The Shadow Knows, The Honeymooners, Dragnet, or whatever you find that appeals.