Remember, if smallville boy says its
GAME OVER, then its
GAME OVER.
But seriously:
I think an important trait for theorising is to speak your mind, and its always good to jump into strange territory.
Alot of people think that their first idea is crazy, yet the craziest ideas often turn out as really good theories or points of discussion.
Also, taking the time to do some research is always good. Get to know alot about the topic your thinking about, and look at different ideas or scenarios.
Finally (for now

), talk to people. It's always good to get someone elses opinion on a theory before really getting stuck into it, so that you can gain more knowledge, and see how people view your idea from the outside, so to speak.