I think my suggestions pertain to safety:
If taking local transportation (non-tourist class), do not keep valuables in visible view - i.e... Do not keep your camera around your neck; keep your money belt underneath clothes (not above). Be careful with your ipod or any electronics, as if you fall asleep with them on - they might be snatched before you wake up. This is a vacation so avoid electronics as radios and other unnecessary items.
Don't leave valuables around in your hotel room, Try to have a backpack with lockable zippers (vs. a drawstring top loading backpack).
Avoid being ... full info