Does anybody have any good tips for keeping flat-ironed hair straighter / shinier / not frizzy??

I have long frizzy curly hair. I got a CHI straightner and love it. There is new one out called the CROC that I want. After I shower I put in a leave in conditioner. I have been using SEXY Hair Soy Tri-Wheat Leave In Conditioner. Comb and let air dry (usually while I sleep). In the morning I use the straightner. I do the bottom half first, pulling up the top. My hair has been soft and straight. I do touch ups every day but wash every three days (my hair is very dry). Hope this helps.

Thanks!