Business Manager- What are the short term goals that carry you to your longterm goal? How closely are you meeting them? What is the overall strategy regarding the branding of your band? What demographic will your band appeal to, and how can you best engage them? What cover songs should you perform live? Where will you spend the night when you play a gig out of town? The Business Manager has his mind on all of these things and is the person who sits down with the Booking Agent, Promoter, Marketing Specialist, Lawyer, and Poll Data Analyst. When he makes sure that all of you are on the same page and working toward the same goal, you have made a significant step forward. The most important person in your band is your Business Manager, so get a good one.
Booking Agent- "Finds you the gigs!" Yes, but again, it goes further than that. A good Booking Agent knows your strengths and weaknesses and will put you in the venues that can propel your career. It's not just about finding work....It's about finding the work that helps you find MORE work....which turns into making more money per gig and playing to larger, more anxious crowds.
Promoter- The Promoter, obviously promotes your shows for you. He'll know how to focus your promotional efforts on your target demographic. This is your money he's working with, so don't waste time with someone who is just good at a putting together a blog page for you and who MIGHT share your Event Invitation. < wink, wink......nudge, nudge>.