A good homemade shampoo recipe?

I have been using baking soda and water (1 Tbsp baking soda to 1 cup water) for almost a year now and I *love* my hair. For rinse, I use 1 Tbsp apple cider vinegar to 1 cup water. Rinse in between and after the vinegar. My hair stays clean longer, never snarls and is very soft and shiny. I would recommend this to anyone!