1. I had to work.
  2. I had a hair appointment today.
  3. My dog got out and I had to find her.
  4. I needed to buy groceries.
  5. I had so many shows to catch up on.
  6. I had the most exhaustingly awful day and needed a nap
    Suggested by @kate81
  7. I was dead.
    This is apparently the only thing that will prevent me from listing.
    Suggested by @kaitmaree