I use every quarter break to vigerously prep my upcoming courses right down the ppt lectures, quizzes and exams, syllabi, study guides, in class assignments and homework. I worked harder during break week than any other time during the quarter yet I can't tell you how relaxed and less stressful I feel during the quarter itsself. Often times I show up 5 minutes before my class, say hello to colleagues who are frantically working up an assignment or exam, go into my office, take out the information I need for class that day (which I might have prepared weeks earlier) and go to my class feeling refreshed and ready to go. Although I rarely get to enjoy complete time away, I never really feel the stress that many do during the term.