Dry - Droppers
One of the best ways to cover various depths during a day of fishing is to use a dry fly and dropper rig. This can be done with any number of different patterns. It is good to remember to use a dry fly that is buoyant enough to carry the dropper you've chosen.
Most of the time this dropper will be a bead head nymph or some other weighted nymph, but unweighted emergers and other flies may also be useful as droppers.Some of my favorite flies to use in this type of set up are PMXs with a bead head JRS nymph, Parachute Adams with a bead head Pheasant Tail or Micro-mayfly, and an BWO Comparadun with a Humpback Emerger during Blue Winged Olive hatches.
Be creative with this rig. You can vary the depth of the dropper anywhere from 6 inches to 6 feet and, where legal, you can even use 2 droppers at different depths.