Do you take breaks when you're revising?

(Source)

It's a long weekend where I live, and I've decided to take some time off my revisions. A huge step for me, as I've been working on the same document most days for what feels like forever now! And it's hardly taken that much arm-twisting from my critique partner either *grins*.

I guess that's made me wonder, how do you do it? Do you sit down for a solid chunk of time and finish all your revisions in one go? Do you have breaks between each revision-draft of your manuscript (and if so, for how long)? Does the whole revising process work better if you come back to a document fresh from some time at the beach/snow/wherever? Or does taking some time off actually break your train of thought, making it hard to get back into the manuscript when you start?

The same questions apply to drafting too, so drafters feel free to weigh-in :) I'm a huge fan of letting a first draft "rest" before you dive into revisions, but do you take breaks at other times as well?