I would posit (on three hours of sleep: I'm not particularly tired -- slightly fatigued, but not tired, at least as long as my are open. But blinking is flirting with disaster) that the weeks leading up to my vacations would be significantly less stressful if I didn't schedule my vacations quite so tightly. For example, I'm leaving straight from the office tonight. I suspect that if I left, say, tomorrow afternoon at some point, as opposed to right after work, I'd be more relaxed and actually get some sleep.

Then there are those who think that such wishful thinking is bullshit. Your call.