Aveda Damage Control is suppossedly a sun screen for hair. I use it and it does seem to protect my colored curly hair.
I agree with try to limit shampooing to twice a week and just use conditioner or just rinse on the other days.
What's the best deep conditioner you've tried? I am always on a search. Anyone tried Ouidad's? I haven't, but am considering, esp. for the cruise.