I read on the bus or while walking, and then in bed before sleep. Sometimes I only get through a page at a time, with much fighting against heavy eyelids!
When I was a med student and had a longer (driving) commute, I used to "read" audiobooks (borrowed from library, downloaded on iPod). Couldn't really stay focused enough to listen to dense non-fiction or to classics (the British accent takes me a lot more focus), but it worked well for fiction! I read a ton of books that way!