Credit Card Processing accounts will be your most lucrative products that you can offer. Building and maintaining a portfolio of business accounts will give you a residual income that will last for many years.

Educate yourself on the different types of equipment and terminology in the industry but don't wait to get started. You will find that you will learn something new almost every day for several years. If  you are asked a question from a merchant that you don't know the answer, look it up when you're finished with the appointment.

WARNING:  You may feel that it's necessary to learn everything before getting started but it's NOT.  This is very much a "learn as you go" business. Also, it's not necessary to share all your knowledge with all merchants. Share only what's necessary to answer their concerns and to close the sale. Too much knowledge for you AND the merchant will cause "analysis paralysis".