NYT crossword, for sure (currently working on a 6-day solving streak, a personal best). I do it daily, and go into the archives for a random puzzle when I’m caught up for the day but still have the itch.
We have a jigsaw puzzle laid out on the dining room table, about 1/4 done, that nobody has touched in a few weeks. Maybe I’ll jump on that today.
I also play the piano a couple of times a week, not sure if that counts as “on the go”.
Does walking count? I do that most days (an intentional walk/hike, not a stroll to the refrigerator).
mmm
ETA: Ack! I just saw that the theme of today’s crossword is “Books of the Bible”. There goes my streak.