Seems like I make a pest of myself but the best way to overcome hook shy fish is with a varied fly selection, but Nate's advise is the best advise.
Any conventinal lure can be duplicated with a fly, plus more diverse presentation, leaving the fly in the "strike zone" much longer than with a heavy jug or lure.
Also you don't have to crank the fly in each time as with a casting or spin reel - just pick-up and lay down the fly in a diferent spot.
OK - I be gone now ....
