I have a comfortable couch, a plastic lap desk, and a pillow below it. On top of it is a fairly old MacBook Air. I used to think I needed multiple monitors until I got the MacBook. Its three-finger-swipe to go from one virtual desktop to another is my favorite feature. I work laying down.
It is fairly dark. I have a Sonos speaker to play music whenever I need to. I get up to stretch and walk around a bit at least once an hour.