Casey, try the Extreme range from Redken, it's for damaged and distressed hair. I found it to be brilliant for conditioning over processed hair. Use the Redken CAT protein treatment too, as well as the shampoo and conditioner. If you don't have a Redken salon near you, you can buy Redken from lookfantasic.com (make sure you join to get the 15% discount). I'm afraid I don't use a hairdryer or straighteners (my hair is poker straight unfortunately) so can't help there, but try Redken's anti-snap treatment, which is a leave in conditioner for use before blow drying etc.