[JBerlinsky]

You probably want a lawyer or accountant to walk you through the process if you're doing any significant volume. Don't use LegalZoom -- they aren't technically providing legal counsel; they're providing "guidance," which won't help you at all if someone comes after you (they're not liable for poor counseling, etc.)

It's worth asking your accountant/counsel if you should consider setting up a LLC that files taxes as a corporation. You probably only want to do this if you are able to pay yourself a consistent, set payroll (I'm not a lawyer or accountant, but I can speak from experience that this is one of the cases where filing in this manner is not helpful, and will actually be detrimental).

While it's easy to create an LLC, it's very easy to create one that can be broken through if someone wants to come after you. Pony up the $200 or so to talk to a proper lawyer with experience setting up corporate entities, even if you only have them tell you what to do on your own.