What sorts of pre-ride checks do you do?
After I THINK I'm all packed up, I first "police the area" - make sure I haven't left any trash (or more likely my cycle-computer) at the current campsite, then...
Spokes, Hubs and Tires
Zippers, Clasps, Bungees, and Pannier attachments
And finally making sure I've reset the comp and have the right tunes on the handlebar speakers