For Trout: I'll start by dead drifting it (tight line/no bobber), then as it gets below me I'll coax it into a slow swing by feeding a lillte line into the drift, and sometimes they like a few twitches thrown in.
Once it is straight below you let it hang in the current for a bit because often a hesitant follower will jump on it then. Depending on the current you may need a split shot above the fly.
Smallies: Dead drift it down along boulder banks or let it swing into undercuts or downed trees and then strip it briskly away from snags at the last second. They'll hammer it.
Goggle eye: Cast it around wood cover or weeds in slow water, let it sink a bit, then start a slow figure-8 retrieve with your rod tip low. Watch/feel for slight "ticks" like a crappie bite.
What I think makes it better than a WB is it has less water resistance, stays deeper easier, and when wet it just looks slimey and delicious.