Sales can be a very hard field to get into, but with proper training and practice you can be very successful. When most people think of a salesperson, they think of a classic sleazy person who doesn't have your best interest in mind, but only wants to make a quick buck off of you.
In order to avoid coming off as this type of salesperson, there are a few things you can avoid. This article goes into detail about a few sales techniques you can avoid and what you can do instead.