The Wooly Bugger is the streamer default. Black, olive, or brown; sizes 6–12. The marabou tail breathes when stripped and pulses on the swing. It catches trout, bass, panfish, and most other warm-water species.
Strip it past undercut banks. Swing it through pools. Drift it dead under a strike indicator. There isn't a wrong way to fish a Wooly Bugger.