It often feels like I know too little for my role. For example, in distributed systems, in networking, in computer science, even in my main programming language. And that results in a strange feeling of guilt for doing something unproductive.
You can try to learn about topics that can help you with your role, but aren't directly related to your specialized field. Examples of skills to develop include writing, public speaking, and negotiation.
Outside of business, you can consider learning how to cook a great meal, or learn a martial art for recreation and mastery.
Just remember while you are watching that movie your brain is subconsciously working on problems for your work. By watching a movie you are still working.
