I'm sure everyone realises here that if you want your book to sell, you need to go out and sell it. Blagging some reviews, offering interviews, author tours, blog tours, advertising eg video trailers, etc, etc.
But what about madder ideas? What mad stuff have you done to promote your book. What mad stuff would you be prepared to do? I've heard stories that Christopher Paolini used to tour bookshops dressed up as a mediaeval knight - would you be willing to make yourself look silly if it resulted in a few book sales?
Here's my first mad stab at trying to promote my novel on Facebook: apps.facebook.com/vreskiwards/
. I'll probably come up with even madder ideas in due course.