My brother-in-law as a Lt Colonel in the USAF stationed at the USAFA his last few years in the Air Force. The General he worked for required everyone to tale at least one 2 week vacation every year. Joe would normally take one week here, couple of days there. When he took the full 2 weeks, he said he actually relxed on about day 10 and went back to work later actually refreshed.

Guess I should try that myself.