Do some recon! As the previous post stated, find current and structure! While doing your recon, your fish finder will be your Holy Grail! Mark fish, note the depth and troll accordingly. I fish tube and worm mostly from my kayak, but occasionally from my boat and this method works.
Again, like the previous post stated, DO NOT limit yourself to 1 method of fishing! You never know what you may run into. In the harbor, I have fished pogies, pollock, herring (when they were legal), eels, and tube and worm, all were effective. Remember, if the fish aren't where you're fishing you won't catch anything. If you do not have a quality sonar unit, I can't recommend buying one enough, they're an indespensible tool!
Just do some scouting, find the current / structure and eventually you'll find some fish willing to eat!