I have really fine, frizzy, short hair. Not cool in the summertime or on a beach wedding day. Anyway, I used Moroccan oil in mine. That stuff smells great, adds just a touch of shine, and helps keep frizz to a minimum.
They have several types of products, I used the oil that you put on before you dry your hair. There is also a dry oil mist and I've used that before too. Both worked out well for me.