My favorite method is the "no retrieve retrieve". Toss the plug out and just twitch it, keeping enough tension to barely keep contact as it sweeps along in the current. This also works well with floating poppers (even at night).
Another favorite freshwater technique that translates well into the salt is the rock bouncing method. When fishing in a rocky area give a small rod sweep bumping your plug into a rock (be sure it's not too covered in mussels or weed or you'll just get stuck). Let it sit for a few seconds like a stunned baitfish. Most of the time, the hit is spectacular - but pay attention, sometimes it's nothing more than a gentle slurp off the surface.