For the last few months, I've been playing a lot of StarCraft II and trying to get better. This led me to do a bit of exploring around the SC community, which then led me to Day. Sean "Day" Plott is a professional StarCraft II caster who also runs the Day Daily: a live, online StarCraft and StarCraft II show. Aside from the usual casting and commentary on professional games, his show also features "Funday Mondays", "Newbie Tuesdays", and the occasional "Friendday Wendsday" which keep the show entertaining for more casual viewers.
Not only is Day insightful and good at what he does, but I think he's absolutely hilarious and fun to watch. If you're into StarCraft, I would most definitely recommend checking him out. Odds are, you will benefit from it in some way or another. You can watch him live, Sundays through Thursdays at 9 PM CST or view his videos on YouTube.
Day's other pages: