Or you could just go without putting any stuff on your hair.
http://www.today.com/health/woman-goes-5-years-without-shampoo-2D11929453I've read about this a lot and in the winter (short haired male) I go without soap or shampoo.
From what I've read for women, it takes a couple of weeks for you body to stop overproducing oils that it does now to offset the shampoo, vinegar, baking soda, etc.
It appears that after the adjustment period your body produces the correct amount of oil and you just rinse your hair with water a few times per week.
My entire soap/shampoo regime consists of Ivory soap. In the winter I use no soap except for hands and face. (wife never notices)
In warmer months, after experimenting, I soap face, underarms and privates.
My skin has improved vastly with this method. I'm guessing I haven't soaped most of my body in over a year.
One super benefit is that the natural antibacterial/antivirus oils on your body really protect you.
For men, one trick is to shave the underarms as this is an area prone to bacteria and thus odor.