David Weinberger lists the troubles of vacationing. I've recently been noticing that vacations resemble work to such a degree that unless you really work on how you think, they're virtually indistinguishable. They both involve lots of chores, things you have to get done, many of which involve waiting in lines.
Work has a key psychological advantage. While you're ready for a grind, there are lots of vacation-like moments. Lunch can be a short vacation. So can certain commutes. Vacations, by contrast, can have lots of moments that feel like work.
It's 97 degrees outside. If I were vacationing, I'd have to come up with some plan for having fun. Talk about a chore.