Hold meetings early in the day, preferably before lunch.  Studies show our brains become much less focused, and we retain less information, as the day goes on.

Know your customers' personality types.  Are you speaking with a military veteran?  Get straight to the point and don't exaggerate your offering.  Speaking with technical folks?  Skip the "we are awesome" slides and dive right into the nuts-and-bolts of what you do.  C-level folks?  Focus on ROI, what their future with your company would look like, and meeting their specific requirements.

At every meeting, refer back to the customers' requirements.  What has been met? What is being worked on? What does the end result look like?  Has anything changed?  Consistently bring your customer back to their original "why" to keep them (and you) on track.

Always follow up.  Immediately, post-meeting, send a message to all and provide a synopsis of the meeting, key takeaways/benefits specific to meeting their requirements, a list of to-do's which you/they need to follow up, and identify the date this is to be accomplished.  Also, reinforce the next meeting date along with the proposed itinerary.

Silence is golden.  Less talking on the salespersons' part should not only be expected but mandatory.  When a customer is provided the ability to speak without interruption, you will learn more about the customers' needs and wants over interruptive questioning which generally takes everyone down the wrong path.  Refrain from trying to solve problems during initial meetings.  This is about THE CUSTOMER!