I'm starting to think that procrastination by reading random articles does
not cause you to rest, that is, you do not regain mental energy from it.
Success and happiness cause you to regain willpower; what you need to heal
your mind from any damage sustained by working is not inactivity, but
reliably solvable problems which reliably deliver experienced jolts of
positive reinforcement.

http://lesswrong.com/lw/3kv/working_hurts_less_than_procrastinating_we_fear/