I let my hair air dry and do not use any products in it, besides shampoo and conditioner, no styling products at all, how often should I wash it, some say every other day, etc...

Mane and Tail for horses. Seriously.

U should wash EVERYDAY!!!! Shampoo I think Herbal something... There is one for smooth hair, etc. U may find them at Target, Rite Aid, and maybe Albertson and others.

Aussie Volumizing Shampoo and Conditioner should do the trick! (the one with Australian Ginger extract!)