It's not the same as regular writer's block but it's just as annoying, especially this one has a deadline (every Friday at 7pm) that I can't avoid. So what to do?
I went to RPG.net and asked for some advice on the forums there. There was a lot of good stuff, and a lot of stuff that applies better to pure newbies. (I'm not a noob, I've been doing this for about 9 years now off and on.) One of the better tools is more like a writing exercise, which is why I think it's so useful. Its called the Adventure Funnel. If you run a pen and paper RPG check it out. It's pretty handy and I think I'll be using it to figure out how to get from point A to point B in the game. It's also good if you know one component for the plot line, but nothing else.