[Mithaldu]

You should pick up a book on medidating, or maybe find some kind of mental hobby. For example designing programs in my head when i'm not at a computer, or reciting kanji shapes i'm learning along with their meanings and readings in my head, are productive uses of time that would otherwise be boring.

[notduncansmith]

Typically I'm not without stimulus long enough to consciously work on development problems (when not at work), but when I do have that much time to myself it's glorious. +1 for quiet alone time.