Much to my surprise, I find that using my iPod Touch and Macbook Air, I'm able to edit very efficiently. What I do is send the book to the iPod Touch, where I read it in iBooks. The shocking thing is that I can grasp the text much better on the Touch screen, compared to seeing it in Scrivener, my writing program. It's just easier to grok. I'm not sure why.
Any other writers out there? What tricks do you use when editing?