I'm not 100% sure this is the place to ask this, but what tools (notifications over RSS, email, desktop widgets, browser plugins or something else entirely) do you use to keep track of what happens on this site (or any StackExchange site). By "what happens" I mean - new questions, new answers/comments to a question of yours, new meta discussions, etc.
I haven't seen anything that's worth attention, so I thought there might be something useful in this area.