What are you completely missing?  Everyone has large areas of knowledge or skills that they are unaware of.  Perhaps some of it would help you become happier or more effective.  Where to get started?

• Ask a successful acquaintance.
• Read.  Read more. Preferably nonfiction or periodicals you’d never ordinarily pick up.
• Consider the opposite course of action.
• Third-person thinking; how would a reasonable neutral party assess a situation?