Turn to face your beliefs, then throw rocks at them
Turning to face your beliefs is the first step, because it requires you to remember that A belief is a degree of certainty and You are not stuck with your beliefs.
The more difficult changing your beliefs are, the more diligent you have to be at throwing rocks at them, since you will need to work against to defend yourself from Inconvenience Bias.
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As opposed to thinking alone, writing allows us to distance ourselves from our ideas, in turn allowing us to assess them better ( Turn to face your beliefs, then throw rocks at them). Using written language allows for an idea to be stabilized and scrutinized clearly. In the act of writing, what in the mind may have been a large nebulous idea might end up becoming multiple more clear and concise ideas.