Pleasant Persistence.

Understand that few purchases happen with a single visit.  Plan your process.  Respect your prospect’s schedule and be punctual.  Always ask about the next step or steps, and always do what you say you’ll do.  Ask your prospect which method of communication he or she prefers, and use that.  Don’t say the same thing with every contact.  Listen and focus.  It’s your job to keep the momentum going.  And even if this sale doesn’t happen, find a gracious way to stay in touch.  Ask what you could have done differently, so you can learn as you go.