16. Nice Pen
You're a man now. Stop using that Bic you stole from the bank. A well-designed fountain pen like the Kaweco Sport is one of those luxury items you have that reminds you "holy shit, I'm an adult!" You will find reasons to write with it, whether it's thank you notes or thoughtful cards to family members on birthdays and holidays. Plus, you'll finally have a reason to practice all the cursive you all but forgot once texting replaced letters.