Learn to think clearly about the problem at hand. Identify the problem clearly and accurately. Elaborate or illustrate only that which must be further explained for clarity, and eliminate irrelevant information.
Become an information detective once you have clearly identified the question or problem. Discover all the information you can regarding the problem or question, then judge that information's accuracy. Investigate and research the problem extensively and without prejudice. Investigate all angles and viewpoints.
Look critically at the information you gathered and question its relevance and accuracy. Have your biases kept you from seeing any information that needs to be considered? Have you gathered information that is irrelevant because you feel it supports your claim? Do not subconsciously keep information that may not be relevant simply because it supports your desired outcome. Make decisions based on fact and not your desires.
Always question your logic as you come to a conclusion or solution. Does your outcome really make sense based on all the information and evidence gathered? Check your evidence and information to see whether it factually supports your outcome. Ask yourself if all the evidence supports your conclusion or if you left some out as irrelevant because it supported an outcome you did not want to consider.