wordsnatch

The trouble is, getting into "the zone" is not easy. When you try to
measure it, it looks like it takes an average of 15 minutes to start
working at maximum productivity. Sometimes, if you're tired or
have already done a lot of creative work that day, you just can't
get into the zone and you spend the rest of your work day fiddling
around, reading the web, playing Tetris

full article here

now that is music to my ears. eyes. whatever.