Frizzy Hair

This summer has been really hard on my hair; it's been incredibly humid and that doesn't make for a pretty situation. My hair has been FRIZZY despite my best attempts of using straightening shampoo, deep conditioner and hair product before and after I blow dry it. I know that I don't help the situation by highlighting my hair but still, come on! 

I wish I had wavy or curly hair so I had the option to at least wear it down without blow drying it.  Alas, I have dry, straight hair.  Bleh. 

Anyways, I decided to take the plunge and buy a Chi straightener.  I read online that it claims to keep your hair frizz-free all day.  I even read some reviews online that people agree with the claim.  I asked my good friend Kate what she thought of hers and she really likes hers.  One of the cosmetic stores around here has one on sale for $50 off so I bought one tonight. 

I'm hoping that it helps at least a little.

How do you keep your hair straight and frizz-free?!