Control the roll! Too often I see a cast aimed on in a good line direction but the loop unrolls too high above the water. The result is that the fly and leader drift back or off to the side causing slack and a missed opportunity. Same thing can occur when you shoot all the line that’s off the reel and it comes abruptly to the end jerking back at you. Practice adjusting the plane of your stroke to let the line and leader unroll just above the water. Then feather the line between your fingers to stop the forward progress. You will end up with a straighter line from line hand to fly giving more control for instant stripping, plus you’ll catch more fish!