Look for opportunities to show interest in all team members. Ask about their life outside of work. Make an effort to learn about their families, their hobbies, their recent vacation, etc. Inquire but never pry. Keep track of names, dates, and events that are important to them, such as birthdays and anniversaries of employment with your company. Showing your team that you care about them as people is one more way to build team sprit. When the sprit is strong, the motivation follows right along.
Create an individual development plan for each employee. Work with your sales managers to create development plans that are customized to each person. The plans should identify things like: current and desired skill strengths; job interests; areas for development and enhancement; and strategies (sales training, assignments, coaching, etc.) for achieving the next step.