1. Every writer needs an editor including the publisher who uses three editors on her own book, Body in the Trunk. The day you think you can see all the mistakes is the day you get awarded "God-Spell" ;) LOL.
2. Selling a book bundle takes the same amount of time as selling a single book, so bundles are great and net more income. I always say it takes 10 minutes to sell $14.95 or $30.95. You might as well offer a bundle and make some real money.
3. The cover matters more than the content. Yes, no riots, please. People are drawn to your book by the cover. We're a visual society. Always make the cover draw them in.