Self-improvement tag says "Questions about improving yourself as a person, working on flaws in your personality and helping improve your interpersonal skills."
That said, a question which is about self-improvement -- as opposed to "interpersonal-improvement" will quickly get closed as off-topic.
Example: How to stop doing bad habits?
I know I'm pushing maple syrup uphill here, but we should at least edit the self-improvement tag so as to not give people false indication that such questions are welcome.
Update: maybe change it to simply say, "Questions about helping improve your interpersonal skills."?
Update: From answers & comments, there appears to be support for retiring the tag...