Dropbox has been an incredible boon. It's like my workspace: any document that I'm actively working on automatically goes in my Dropbox folder on my computer. As I make changes, the new version is immediately uploaded. It's like autosave on steroids, in that not only are all my changes saved, but they're also being stored offsite. And if I'm working on something and then head to lunch, there's the document on my iPad in case I need to look at it. That's the beauty of the cloud. I can't edit the document directly in Dropbox on my iPad, but there are very low cost office suites that work seamlessly with Dropbox.