Take a bath...

From Pi:

SOL	Remember Archimedes of Syracuse? The King asks Archimedes to determine if a present he's received was actually solid gold. Unsolved problem at the time. It tortures the great Greek mathematician for weeks. Insomnia haunts him and he twists and turns on his bed for nights on end. Finally, his equally exhausted wife, she's forced to share a bed with this genius, convinces him to take a bath, to relax. While stepping into the tub he observes the bathwater rise as he enters. Displacement. A way to determine volume. And thus, a way to determine density, weight over volume. And thus, Archimedes solves the problem. He screams "Eureka!"—Greek for "I found it!"—and is so overwhelmed he runs dripping naked through the streets to the King's castle to report his discovery. Now, what's the moral of the story.
MAX	That a breakthrough will come...
SOL	Wrong. The point of the story is the wife. Listen to your wife, she will give you perspective. Meaning, you need a break, Max, you have to take a bath, otherwise you'll get nowhere. There will be no order, only chaos. Go home and take a bath.

I had an Archimedes moment over the weekend. I'd been struggling to work out the problem all last week. Came in this morning and got it nailed in a few hours.

Take a bath ;)