1. Dirty dishes
    It is pretty easy to get distracted by other stuff you have to do. The dishes taunt you, especially when you've got an otherwise annoying task to attack.
  2. Inertia
    This is struggle! Once you're home it's really easy to stay home. Going out is hard you know. You have to put pants on. And other stuff.
  3. Snacking
    If you work at a tech startup this might be moot. But if you are home there are so many snacking options, right there! And willpower has been scientifically proven to be finite.