I just thought of one other idea I've used. It may sound odd, but get off the computer. Get a pen and paper and jot down random thoughts about your story, maybe quick, point form sections of dialogue or scenes that come to you. Don't try to put things in any particular order. Just jump from idea to idea. I find doing this often leads to more ideas and soon I'm past the block and rushing back to the computer to start writing.
ML
