Sales success relates directly to one's ability to get along with customers and build their egos. By taking these steps with your customers you will help them to have a better opinion of themselves and usually it follows that they will have a better opinion of you as well.

Establish a friendly connection - find something to admire and/or compliment the customer about
Get them talking - ask open ended (not yes-no) questions that will get them talking about themselves and their life and accomplishments.
Listen carefully - everyone likes to talk and know they are being heard.

The reverse of the above is true as well. If you take time to feel better about your customers you will probably feel better about yourself. Rewards all around!!!