If you are still around, here is a great article you might be interested in. It's a PDF file.
It's written in easy to understand language by Al Kyte and Gary Moran about an analysis they did of two groups of casters : "Good" casters and "Elite" casters casting the same equipment in the same conditions under the same circumstances while being taped with two video cameras and analyzed later.
It is probably the best article I've ever read on straightforward casting and it is aptly titled "Going for Distance".
I would highly recommend it for all. It is not that long and is very interesting.