What did Steve Jobs do when he got stuck on a problem for 10 minutes? He took a walk. Science is now finding taking a walk does help your brain solve problems:
Wanna hear how Steve solved the problem of the prototype the iPod team showed him being too big?
"Make it SMALLER," Steve said.
"We CAN'T!" wailed the team.
Steve carries it over to the aquarium in his office, drops it IN, points at it, and says, "See those bubbles? That means there's SPACE inside. MAKE IT _SMALLER_."
End of meeting.