You need to know your team's individual personalities first & what motivates them, then it's easier to divide the tasks which have to be done. Praising & thanking your team are also important. A reward scheme [ eg movie tickets] for those who sell more or achieve consistently high targets in your company will also boost morale.

Read this book: Winning by Jack Welsh

First, remember that not all leaders are managers, and not all managers are leaders. Second, remember that best people for the work you do are the people who want to do the work. Third, always keep the focus on the business objective -- keep the drama outside the office.