Working towards your knowledge, should be a primary directive of a great salesman/saleswoman.

The ability to sharpen his/her skills is the key to survival in the sales field. Knowledge required to be acquired can be in terms of knowledge of the markets, its situations, its leading providers & even competitors.

Knowing about what you are selling and how it stack up against the competition will also be key. Improving your knowledge is also critical to improve sales techniques. Being informed about your competition should also be very useful to selling with ease.