1. make a list
  2. nytimes mini-crossword
  3. judge other people on the caltrain
  4. invent yoga poses compatible with train rides
  5. knit Hanukkah presents for friends & family
  6. message strangers on dating apps
  7. discover new music or listen to old favorites
  8. read a book or the news
  9. look out the window
  10. write
  11. catch up with friends and family
  12. work on my LinkedIn profile
  13. write guitar song lyrics