Thank you ladies for all your advice! Maybe it is time I invested in one of those high tech "ionic tourmaline whatever" hairdryers. Mine's a Conair and it works okay at drying my hair. I also feel that I don't get volume at the roots when I diffuse, even when I turn my head upside down. The bottom half of my curls are nice and bouncy, while the top is just flat and frizzy. The only way I get the volume I want is when I flip my curls to the opposite side of their natural parting but even then the curls lie unnaturally.
I will try some of the tips that you guys have given me. Thanks so much for responding. (: