key points to understand
Observe Your Surroundings: This goes for any method of fly fishing, but before you get to the water, take a moment and observe your surroundings. Look at water levels, flows, and fish/bug activity.
Nymphing is usually a “go-to” strategy if you are not seeing any surface activity. Using nymphs will consistently give you the best results. Try looking for bugs on the water’s surface, stream beds, rocks, moss, trees, and other vegetation to give you a good idea of what patterns to use.
Indicators: Put your indicator 1.5x the depth of the water you are fishing. While fishing, and moving to a new hole, you’ll need to constantly adjust your indicator to 1.5x the depth of the water. This will allow you to get your nymphs to the proper depth of the run where the fish are.
Line Control, Mending, & High-sticking: We’ve covered mending and highsticking in greater detail within the mending section, but just in case you skipped around, we’ll make this SUPER IMPORTANT POINT again (Go read the mending section!).
One huge separator between skilled fly fisherman, the ones that catch tons of fish and those who only catch a few, is mending. Because a river has many different currents, pulling at different speeds and in different directions, you’ll need to adjust your fly line (green line) above your nymphs during each drift. This will allow your nymphs to sink down to the target zone, where the fish are. It will be free flowing, natural, and enticing to hungry trout. When the fly line pulls on the nymph, it pushes it towards the water's surface in an abnormal way. Fish pick up on this immediately and are deterred. Learning how to manage your line and mend is an absolutely critical skill to learn.