In order to become a successful salesperson, the key is to put down roots. Any salesperson will be more successful if they stay with one dealership, regardless of the product, than one who hops around.
The reason being, you become associated with the dealership you work for and the products you sell.
You will also become, in a short time, the only salesperson with any tenure, as there will continue to be plenty of hoppers that come and go. When the time comes for orphan customers to purchase another vehicle, yours will be the face that they recognize and, in turn, will be more inclined to do business with you.
There are a lot of ways to become a successful salesperson; proper prospecting, proper follow-up and by following an effective sales process.
Imagine how many sales you would generate if you followed all of these guidelines AND you did so all in one dealership.