A mayonnaise treatment is supposed to tame the frizzies. Take about half a cup(this depends on how much hair you have) and work it into your hair after it's been shampooed. Leave on about 15 minutes and rinse well.
The best thing for frizzy hair to to use a straightening shampoo. Wash your hair then towel dry it for a few minutes. You should use some gel or straightening serum and blow dry before you straighten it with a flat iron.