There is plenty of money to be made through sales, but much of this revenue is being left on the table due to one key misstep: failing to follow up with clients. As a salesperson, you are in charge of making clients feel comfortable while you attend to their needs and concerns. Most of this relationship is born in the initial follow ups to a sales pitch or networking event. But there are many other times when salespeople forget to follow up and leave money on the table.