Damaged hair problems please help?

My hair is very damaged from constant straightening and dyeing, During the school year i straighten my hair everyday i know its really bad for your hair but im trying to cut down this year. My hair falls out a lot when i brush/comb or just run my fingers though it. i have mixed hair a combination of puerto rican and african american. I've stopped using all heat on my hair since school finish. Does anyone have any tips besides on restoring my hair, stopping the breaking off, and split ends. ive tried the macadamia deep conditioner but it didn't help much since my hair so damaged please help.