How do keep color treated hair from breaking off? How long should u wait to re-touch colored hair? Answr addit

I dyed(golden bronze) my hair May 23, 2007. But, it seems to be shedding alot. I try to wash it like every wk considering i am a black woman. What kind of products is good for an African American woman who has colored treated hair. How to maintain breakage but still keep the smooth and shiny look. I dont use alot of oil(grease) on my hair except oil sheen. I do use the Pantene Pro-v shampoo and condition for women of color. What else can help maintain healthy hair without less breakage? Many responders....