I am most likely selling my MBA in the next few days and want to back everything up before I do so. I don't have a new mac yet to transfer everything on to so I need a way to put everything on an external drive that will retain my settings, iPhone backup, iTunes, iPhoto, and internet bookmarks. Is there a good way to do this? I also don't have the install discs on me, so I won't be able to do a fresh install. What's the best way to prepare my machine for sale without being able to reinstall Mac OS X? Or should I hold out for the discs?