A. Very first thing, was learning how to cast in order to land the flies, and sighter on the water lightly and at the same time. It could be surmised as a high, very short stroke, that ends with your rod pointed at a point very high above your target. I think the point is to have the leader and tippet completely straightened out when it lands on the water, as to register takes quickly.
Also not using too much power on the forward stroke, but let the rod flex and do the work for you, much like over powering a graphite shaft golf club, the club head is always lagging behind and the power is wasted.