Originally Posted by kglissmeyer1
A good tactic I learned early in my fly fishing experience is to "give them the rod tip" whenever they jump - just drop the rod tip and stretch your arm towards the fish. This feeds just enough slack into the line that when the fish re-enters the water it's not as big a jolt to leader and tippet. Not sure there is science behind it, but I've gotten in the habit of it and rarely lose fish when they jump.
In Salt water fishing this is called "Bow to the Fish." Same idea.