That said, be aware of the fuzzy line between using your cool-down time at work for your startup and stealing time or resources from your employer.

FORBES: Should Startup Founders Keep Their Day Job?

"Referees, should they so wish, have the opportunity to conduct post-match media interviews, after 30 minutes' 'cool-down' time, to clarify any point of law, " said a spokesman for PGMO, the body responsible for top referees.

BBC: Ref Styles admits penalty mistake

Trying to conserve her energy, she barely qualified for the final ("Definitely a little bit of a scare, " she said.) She didn't have enough time for a proper cool-down, so as her U.S. teammate Ryan Lochte swam to a fourth-place finish in the men's 200-meter freestyle, Franklin swam slow, lonely laps by herself in the adjacent diving well, trying to lower her heart rate and ready for her main event.

WSJ: 2012 London Olympics: A Priceless Gold for Missy Franklin - Jason Gay