Has anyone here put their book up for pre-sale on Amazon? If so, when did you do it? Before all the formatting, etc., was done, or after? Did it help your marketing to get sales before the official release? Did you get any early sales? How about reviews? Are there any stories out there of authors who put their books on pre-sale too early and missed their launch date? If this is something I'd be an idiot not to do, I want to know about it now, and do it at the right time.