How do you treat dandruff besides a dermatologist and Head and Shoulders?

Had it for years and it only stopped once that i can remember.How do you treat dandruff besides a dermatologist and Head and Shoulders?
T-Gel shampoo from Neutrogena. It's for seborrhea, psoriasis and bad dandruff. However, you would probably only want to use it once in awhile because its made with coal tar and can really dry out your hair. Another shampoo you might try is Head and Shoulders Intensive Treatment...it's orange colored but from what I've read...it works.How do you treat dandruff besides a dermatologist and Head and Shoulders?
Try the Paul Mitchell (i think) product TEE TREE it works for me!!