Three kinds of writer's block (and how to cure them!)

During my recent visit to Highgate Elementary School, a student asked one of those questions that can only come from a fellow writer:

Do you ever get writer's block?  There was something about the way she said "writer's block" that made it sound like something you could catch if you got to close to a sniffly author or brainstormed out in the rain, and I kind of liked that... but anyway...

The short answer to her question is: Yes.  

I suspected she also wanted to know what to DO about writer's bl...