I've found that while I can sit still and read for any length of time, I can't sit still and listen for more than like a minute. Meetings, phone calls, conversations... If I can't get up and walk around, I go insane. I solve this in meetings by bringing a notepad and covering page after page with doodles. It's something for the physical half of my brain to do, so it stays out of the way and lets the mental half focus on what's being said.

For phone calls and in-person conversations, I just get up and walk around.

For audiobooks, I go for a (long) walk, or do some menial task that doesn't involve a lot of mental focus - doing the dishes, sweeping and vacuuming, folding laundry, etc. Anything to keep my body busy so my mind can focus on the book.