Pre-poo..anything you want to do to your hair to soften it, help with detangling, combing, aid the later shampoo process. You can add oil, conditioner, herbal mixture..whatever your hair likes then do a regular shampoo. I like to use mustard oil, any other oil or conditioner for an hour or so, sometimes just a cap or a heat cap then do regular shampoo..I follow with a quick rinse out conditioner and lots of rinsing to avoid scalp build up. Check the threads by searching..lots of ideas.