There are two items you can get from the office supply store: 1) a rubber finger tip, and 2) something you can rub your fingers against to make them more sticky.
Most people don't like either, and they can become a crutch. "Geez, I can't PhotoRead now because I don't have my rubber finger."
The more you PhotoRead, the better you get with page turning. No matter how good you get, however, you will come across books with paper so thin or slippery or stiff that pages are difficult to turn. I found that last weekend with Morris' book "Dutch."