Roll casting is probably the most efficient way of getting your fly back on the water. I tell beginners to aim at the horizon and let your line fall where it may at first. Then gradually aim for accuracy. Increasing your catch is based upon fly in the water and not in the air.

2 great instructional youtube

https://www.youtube.com/watch?v=aRaCV5c63mY&nohtml5=False
https://www.youtube.com/watch?v=9a4i...&nohtml5=False

Good luck