Read lots of books on Sales, Listen to books in Transit.
Author: Brian tracy is good.

Here is a quick tip: That will get you off ground quickly.

First rule of Sales: its not about your product / service its about customer. Your prime objective is to understand customer and their problems / preferences related to problem you are solving or gain you are offering.

Second rule: Don't talk - 'ASK'. Take genuine interest in your customer and ask them questions about the problems they are facing or how they value gain you are offering.
Ask questions that will trigger the need for your product and service.

If you tell me more about your product in specific I can help you with developing a powerful pitch. You can schedule a call if you want more help.

Hope you find this useful anyway.
Good luck with Sales. :)

p.s: 7 years experience in hard core sales and Marketing agencies like Ogilvy.