I also encourage teachers to do things NOT in the education field in their spare time, which I know is not easy. In the big picture, some time for yourself will be most helpful for your students, as well as yourself. Believe me, I have spent too many 7-day weeks at my teaching, which eventually became counterproductive. In the classroom, take charge. Kids appreciate discipline.
Unorganized chaos ends up negatively.
Kids will respect you and you can guide them into better learning. Make yourself available as much as possible to students. Take advantage of that one student who is seeking help. You can make a difference. Teaching is all the negatives that Janet noted in her article, and more so the joys that she described.