Know When to Quit
It’s a fact. You won’t be able to win over everyone. In order to be a successful salesperson, you must know when to quit. If you have tried your hardest to make a sale or acquire a client, and nothing has happened, stop. While persistence is good, if you continue for too long, potential customers will be extremely annoyed, overwhelmed, and will probably never consider your business.
You are much better off pursuing other potential clients or taking a closer look at your marketing strategy.

