Conventions and Selling books

I’ve been setting a goal for myself to start selling my books and other associated items at conventions in the coming years. It didn’t really make sense to set up a booth for just my one novella. I’ve been trying to get back in to writing my next book or getting my already finished science fantasy novel into an editor’s hands and perhaps then onto my library of books to sell.

I know that I need to start paying better attention to con schedules (especially local ones) and figuring out the processes to getting a booth at them to sell them.

I know this is a shot in the dark, as most of my readers here are not the type selling things at cons, but if anyone does read this and has any advice into how to go through the process, what would be needed to make it a profitable (or at least successful in some way) venture.