To become a sales consultant, you will typically need to establish a strong track record as a salesperson and demonstrate in-depth knowledge of the industry or industries in which you want to consult as well as a sound understanding of business best practices. You will also need to learn how to market and manage your own business. While formal education can be helpful in your quest to become a sales consultant, this is the sort of profession in which on-the-job experience and strong networking skills are the key to your success.