More water. Take a decent hat with a brim that goes all around.

Remember to slow down. If you're with friends or family, watch them for signs of heat cramps (caused by loss of salt from heavy sweating), which can lead to heat exhaustion (caused from dehydration), which can lead to heatstroke, which can cause shock, brain damage, organ failure and death. It is better prevented than treated by using common sense.

Something for creating your own shade is a good idea. If you'll be in the actual desert, there usually isn't much around that the rattlers haven't already claimed.

Keep a PSK with you... LOTS of people have gone on day trips not expecting to camp out. <img src="/images/graemlins/grin.gif" alt="" />

Sue