You’re on a skiff with a fly rod, watching a big tarpon cruise your way. You make a solid presentation. The fish starts to track. Then the gills flare, its mouth opens and sucks in the fly, you raise the rod to set…and completely whiff. Lifting the rod the second a tarpon eats is a rookie mistake, but with a little discipline and a cool head, you’ll rarely miss the stick. Here’s the drill.