Swinging nymphs: When I do it, let your nymphs drift like normal, then when the current takes over leave your nymphs so they "swing" (your upriver mend becomes a downriver mend) this will make your nymphs rise. DO NOT, I repeat DO NOT pull those nymphs outta the water until they are directly downstream from you. At the end give your line 2 small 3 inch strips then recast.
I caught most of my fish in montana this way. Theory: Loose nymphs dragging on bottom get the fishes attention. They'll follow it and key in on it as SOON as they start to rise. Sometimes they'll just bump it then take right at the end of the drift. Fish this way when you see "fish backs" rising and not "sipping" If they're not takin yer dries they're takin your emergers so this is where soft hackles are deadly.