If your hair is still colored now I would get Redken Color Extend it makes the color hold really well, if your hair is totally fried Redken Rescue Me works wonders on fried hair.
I would also pick up Paul Mitchell Super Skinny Serum, its a heat protectant. I use it every time I take a shower even if I know that I won't be doing anything to my hair, its smells like watermelon jolly ranchers. I think I would die without it.
Also if your hair is really weak I would pick up HealthySexyHair Soy Potion I use this whenever my hair feels a little blah and it seems to work pretty well. Also see if you can this other thing, its part of the HealthySexyHair line, it comes in a small little blue tube, its like a little boost for your hair, I'm sorry I can't remember what its called.