Paul Castain, Vice President of Jedi Mastery at Castain Training Systems, says a lot of salespeople research a prospect only once during the process.

FORBES: How The Best Salespeople Make The Sale

Castain says the best salespeople turn rejection into a learning experience.

FORBES: How The Best Salespeople Make The Sale

We consulted with sales coach and author Wendy Weiss, also known as The Queen of Cold Calling, Jill Konrath, author of SNAP Selling and Selling to Big Companies, and Paul Castain, Vice President of Jedi Mastery at Castain Training Systems, to compile two lists: the 10 things salespeople should never do, and the 10 things salespeople should always do.

FORBES: The Essential Do's and Don'ts of Selling