Teaching is always a good way of learning and it's been quite good fun doing research on the internet for this. Without going over the top, I have been trying to distill the key practical skills for a political blogger. Imho, if you can improve your proficiency in any of these areas, it will probably make a noticeable difference to your blogging capabilities.
Writing - Croydonian has a style which is concise and yet engaging. I like Kerron's conversational style of writing, too. How easy you are to read is a crucial factor in how successful you blog can be.
Arguing - A course in critical thinking wouldn't go amiss - if only to make yourself aware of your opponent's likely spoiling tactics. Dizzy's good at arguing. Although, if you're too good, you won't get any comments (joke).
Public Relations - How do you market yourself to achieve the audience that you're looking for? I think I'll tap Ellee for some smart ideas.
Psychology - You learn a lot about people when you blog. I doubt I'll ever be as skilled as a pro, but I'm not averse to picking up insights from Dr Michelle Tempest's blog.
The weekend itself looks excellent and there are many superb speakers planned. If you're not signed up yet, get your skates on. Link. Does anyone have any relevant thoughts or resources that they'd like to share?