I need tips on fried hair please?

My hair fries really easy and i normally straighten my hair everyday.My friends can straighten theirs everyday at 400 degrees and its not fried it really soft smooth and healthy and they use regular shampoo and conditioner, I put my straighter on 325 degrees and no i do not straighten it really slow i use tresseme naturals shampoo and conditioner with vitamin e its suppose to keep your hair from being damaged i just started using it like 2 or 3 weeks ago and i have not straightened my hair sense friday june 3rd because im scared to fry it.I'm planning on straightening it on thursday because im going out with friends. I was also wondering this, my mom knows i want to color my hair blonde (i have blonde hair its just dark) so she got me shampoo and conditoner that takes the dullness out of my hair so my hai actually looked blonde! So do i use that every day and use the tresseme atleast once a week or use the tresseme everyday and do the blonde shampoo and conditoner every now and then...I dont want to use the blonde shampoo and conditoner all the time because i need to use the tresemme to help my damaged hair.Also i was wondering if you knew and good shampoo and conditioner for me that i can buy at like walmart tomb thumb target? My hair is dry brittle and frizzy.