There’s an old saying among fishermen: You can’t catch fish if your line isn’t in the water. I believe that this is one of the reasons that wives often outfished their more-experienced husbands on float trips when I guided on the Yellowstone and in Alaska. Whereas the husband recognized every great trout lie the boat floated past and felt the need to cast to all of them, the wife was generally more content to keep a given drift going as long as possible. Every time the husband picked up his line and started false-casting, he was taking himself out of the game. (Of course, this is a gross generalization not meant to discount any accomplished female fly fishers out there, including lots in this building.)
Novice fly fishermen should take this to heart. . .and take it to the extreme. Unless you are casting or changing flies, keep your fly in the water. If you need to adjust your sunglasses, take off your jacket, or blow your nose, don’t stop fishing. Simply let your fly drift, swing, and hang in the current. Anytime the fly is in the water, a fish might eat it.
This is true even when you’re moving to another spot (as long as difficult wading isn’t required). Cast your fly, and then work your way up- or downstream. If you’re walking upstream, your fly will be dragging behind you, and every angler has a story about catching fish by “trolling” this way. If you’re walking downstream, stay several yards behind the fly, and let it drift naturally for as long as you can.
The first fly I ever tied was a Devil Bug, which I immediately took down to the Yellowstone for a test drive. After about 15 minutes of fruitless casting, I decided to change flies. As I perused my fly box, I allowed my line to hang in the current directly downstream. Before I could decide on a replacement pattern, a 17-inch brown whacked the dangling Devil Bug and hooked itself. Not a bad fish for my first fly, and I never would have caught it if my fly had been in my hand.