HN old-timers probably remember 'edw519, who sadly isn't commenting much anymore. One of the things he is known for is for extensive use of pen/pencil and paper in his programming work - the second part of his day involves printing out listings of whatever code he's working on, and working on them away from the computer.

There's a collection of edw519's best comments here: http://static.v25media.com/edw519_mod.html - CTRL+F "paper" will show many answers in which he talks about how he works with it.