Tips & To Do

Insect repellant (I have plenty bird, don't buy any)
Yogurt days prior
Pesos or dollars fine
Check gas station pumps
Triple-Check Rental Car Before Leaving, Especially Tires, Spare, and Brakes
Camera
Sunscreen
DON'T FORGET SUNSCREEN
$100 in $1 bills
snorkels -- buy silicone for better fit
print websites
print all maps from frommers.com
print travelocity itineraries incl rental car
backpacks
hand sanitizers