My suggestion... re-read all of SignManiac's posts in this thread. He is 100% spot on and his logo offering is the best in the thread.
I wish there were some basic criteria to enter the sign/printing business. Seriously. I mean, you gotta pass some kind of test to be a journeyman electrician. You gotta pass CPR to be a lifeguard. Hell, you need to memorize the produce numbers to be a cashier at the grocery store. Yet, to open a sign shop you don't need squat. The very first thing you need a good grasp on -- before anything else -- before coming up with a name -- before opening your bank account -- before buying equipment -- before chasing down customers -- please, at least pick up a book or two on typography. This is what you plan to do for a living? You need to understand font selection, color theory, leading and kerning, etc. Seriously, please... stop what you are doing and go to the book store. If you are broke, just sit there in the store and read. Look at some logos. Look at TONS of logos. Find some stuff that suits the style you are going after and get inspired.
Good luck.