Opinions! People love to share them! Unfortunately, opinions are biased. I started to study wikipedia's list of biases.
I wanted to become less biased and be able to form better opinions. I noticed that I was having difficulty "training" my brain to be less biased like I would to prepare for a math exam.
I think this is due to the nature of cognitive biases. The hindsight bias is a good example that, even though I am well aware of how it works, I am still influenced by it. I can arrive at the conclusion; "this is obvious", remember the hindsight bias, and still "feel" like I "knew it all along."
My conclusion is that the only way to start correcting your own biases, is to memorize each one. I hate memorization, I think it's an archaic way of learning, but being able to recite each bias may be the only way to prevent them.
Link to list of biases:
http://en.wikipedia.org/wiki/List_of_cognitive_biases
Link to list of biases: http://en.wikipedia.org/wiki/List_of_cognitive_biases