Putting that fly where you want it, when you want it can be a challenge. A problem for some anglers is they really don’t really aim when they cast, they just toss the fly in the general direction of the bank, or that big rock over there, and hope.
In her book “Fly Casting Techniques,” Joan Wulff writes about the importance of two imaginary target lines.
The first is the line between your eyes and the target. The second would be the line from your casting hand to the target. It doesn’t matter where you hand is in the casting plane – vertical, horizontal – see the target and make sure your hand and eye target lines are meeting at that specific spot.