The most important thing is to first treat them as part of your family. Then see what are they getting out of being a sales person, are they just getting base pay, commision or both? Do they get recognize or rewarded when they have the highest sale ex. throw a party, money incentive, sales person of the month, etc. You have to make them feel like they make a difference and that they get rewarded for what they doing. and as a leader set and example for them do sales yourself . if a general dare not do what the foot soldier do then how you expect them to respect and motivate to push 100% for you.