I just read this book a few months ago, It was fantastic. After No More Mr. Nice Guy I highly recommend Models http://www.amazon.com/Models-Attract-Women-Through-Honesty/d... and How to win friends and influence people is a great self help book too http://www.amazon.com/How-Win-Friends-Influence-People/dp/06...

I've read these three books (Nice Guy then Friends and then Models) over the past few months and they have really taught me how to build up my confidence.