Bring lotion to off-set hand sanitizer.

Bring bandaids for papercuts.

Do not experiment with self-tanning lotion the night before.

Realize the door you've opened the first time you agree to sign something other than a book.

Practice, well in advance, your public face. Employ a trusted friend to practice awkward scenarios with you. i.e. "When I read your book, I knew killing my husband was the right thing to do." or "I saw you get out of your car. Publisher didn't pay much, huh?"