Questions are the answer!
Do you agree? Could that be true? Did you notice what I'm doing to find out? (hint: I just asked you questions).
I agree with Tony. Thinking is asking and answering questions. The quality of your thinking is determined by the quality of your questions.
Your mind is a powerful computer, capable of answering anything you ask it. No matter what you ask, your mind will come up with answers. If you ask lousy questions, you get lousy answers. If you ask great questions, you get great answers.