I agree about the sun. I got pretty sun-sick after my second Oly tri. It was a hot, sunny, clear day. Afterwards, at lunch, I started to feel hot, nauseous, clammy, and disoriented. I drank a lot of cold water, had someone drive me home, and spent the rest of the day soaking in a cool tub and sleeping. The next year I was prepared with better sunscreen and a hat with a brim all around, but it was cool and overcast. This year...hope to do better. I bought spray on sunscreen to douse myself with in both transitions. I'm fair skinned and burn very easily. I am sure that drinking more will help, too. I'm considering a fuel belt for the run. I'm a slow runner, and it would be good to drink more as I go than what I get at the water tables.