Study philosophy. I agree with Matt that it's far and away the most useful discipline for this business. I was a poli-sci major, and I acutely regret it. The fluency with logic and argument that philosophy confers really does offer an advantage to its adherents. Blogging is hugely reliant on the ability to accurately and critically assess arguments and correctly comprehend their weaknesses, and philosophy is the best training for that. If you simply hate the word "ontological" and are desperate for a knowledge base, you can go history. But really: Don't do poli-sci. Read the newspaper instead.
