18. Eat Ethiopian food, a half smoke, Five Guys, blue crab, Jumbo Slice, mumbo sauce, Greek Deli, Pho 75, 2Amys pizza, and anything José Andrés. Or any of these.
19. Get on some kind of vessel on the Potomac, be it a kayak, canoe, paddleboard, your friend's boat, or a large piece of driftwood.
20. Break a sweat walking up a broken Metro escalator in the middle of summer (looking at you Rosslyn, Bethesda, Wheaton, and Dupont).
21. Make it to a Caps, Nats, Wizards, or Redskins game and yell "O" during the National Anthem -- even though you’re not at an Orioles game. And, at Caps games, know when to yell "who cares", and "It’s all your fault!"