1. I didn't wear my heart on my sleeve
  2. I didn't roll my eyes so often
  3. I didn't over commit
  4. I didn't procrastinate (as much)
  5. I realized when things are a bad idea earlier rather than later
  6. I didn't laugh at my students' misfortunes as much.
  7. I wasn't completely and totally addicted to li.st.
    Suggested by @doodler19