If you ever find yourself in a rut you might try to reflect on what I have suggested. Someone once asked Einstein if he thought that the Theory of Relativity was complete. He said that it was. I still think that there is some wiggle room left.

There is a good analogy to what I have been talking about. Drop a rope over a waterfall and then jump over. Mark the rope periodically as you go down. When the experiment is over have someone pull the rope up and see how long you were able to mark the rope. He might be surprised to see how long you were able to keep going at it.