There are many excellent books and video presentations
which are great tools for mastering the gentile art of fly casting.
Even though these resources are an outstanding starting point,
it is worth going to your local fly shop and seek out an instructor
in the fly casting discipline. As stated, fly casting is much like
learning the golf swing. Many of the fly shop owners, are more
than willing to give you a few pointers. This says alot for the
guys who make a living in the fly shop business. By and large
they are a great bunch. There passion in helping new people
get started is one of the engines that drives this gentile sport.
Having said that, you have got to practice. If your
blessed with a casting pond in your area, that is the place to
go. Good luck.