#13 - ALWAYS pack an extra pair of underwear when traveling! Trust us. Just do it! Think it's unnecessary? Here's a bit of wisdom from Brian Andreas:
"Make sure you got clean underwear, she always said, in case you get in an accident & I always figured that'd be the least of my worries, but now I'm older & I see there's a lot you can't control & clean underwear is one of those you can. For the most part."