I've taken the same week vacation almost all my life. Before I go, I'll take the time to document some of my regular responsibilities, the status of my projects, open items, and troubleshooting steps for issues that normally fall to me. Some of that is just copying and pasting from the previous year's document. I'll send that off to my boss along with a little information about how to get me if he needs. Fortunately, he's had his own vacation ruined by interruptions, so he has never called me during one of mine.

Depending on where I'm going on vacation and how long I'll be gone, I may take my laptop with me. So far I haven't needed it. As far as email, I'll occasionally take a look at the email subjects but that's about it.