One way to unlearn is to begin A Notebook of Things I Don’t Know About.
Another way is to document “the roads not taken.”
According to this article one way to change your behavior is to document actions you didn’t take.
For example, if you wish to save money and protect the environment by driving less, one way to do this is to begin by documenting all the trips you didn’t take.
The reason this works is because people have multiple reasons for wanting to do a behavior and the more reasons you give yourself, the more likely you are to modify your behavior.