Be enthusiatic. Be liked.

I've read 100's of books on sales but the two basic things to remember is:
1. Be enthusiatic
2. Be liked.

Enthusiasm will get you far in life. Enthusiasm is contagious. People love enthusiastic people. The first sale you need to make is to yourself. You need to get yourself excited about the product and the rest will come easily.

It's true that people buy from people. If you are liked, people will buy things from you and will recommend your products to other people.