There has been a tremendous amount of styles and techniques in Sales out there and it really takes a lot of creativity and patience to be able to sell. An effective sales person always equals to lot of sales and success.
I know an ebook that has really given me great tips and technique in Sales or Selling. It has great positive effects on my career. I thought I'd share it with you, it is a Performance Sales Ebook by Donald Brownlie Fleming. Anyways, if you are interested, you can visit his blog:

http://blog.donaldbrownliefleming.com/