First you go out and buy a stick--it's called a baton--about this long.
Then you get some music, you get musicians together, you give them this
music, you stand in front of them with the stick in your right hand, you go
like this, and a mysterious thing happens: the musicians begin to play.
Now, once the musicians are playing there are only two things you must
remember, but they are very important: you must not disturb the musicians
while they are playing, and second, when the musicians have stopped
playing, you must stop conducting.
-- Sigmund Romberg
You know you've been hacking too long when...
...your radio is playing and you're starting a big compile on your home
box, and it occurs to you that the music will begin to get a bit jerky,
because you think it's playing through the computer and you're not quite
sure how well it'll multitask with the compile....