FInd the schools of fish by looking for the birds. not birds flying around in the sky but ones doing a flutter just above the water or dive bombing. also worth investigating any birds just sitting on the water in an area not sheltered.
you will know you are in the right spot when the fish "bust up" the surface which will be splashes or swirling water. they will go down then come back up periodically.
you want to use max 30lb leader (if they are rats-70cm then 15lb braid and leader should be fine, 70cm-1m then 30lb braid and leader will do). I prefer to use lighter leader and lose a fish once in a while but hook up way more.
The lures you should be using are tiny 5gram metals, 3inch soft plastic minnows (opaque white or silver with glitter) rigged on light jig heads with a strong hook (bushy does a good make of these) or 6 inch sluggos unweighted.
Cast into the bust up or in front of it if it is moving, let it sink for about 5 seconds and then retrieve at a steady moderate speed. you will mainly get salmon and taylor but every 10th fish or so is turning out to be a king.
when you hook a fish watch as you are bringing it in because it is not uncommon to see kings following it to the boat. Invest in a decent pair of polarised glasses and if you see this happening flick a small soft plastic lightly weighted over the side (to look like the whitebait that falls out of their mouth as you bring them in) and you will often get a hook up.
most important thing is to sneak up on the fish. motor down wind and get blown back up into them, once you have drifted off the school do the same again. I cant tell you how many times i have been pulling fish out of a school, someone sees and comes speeding over in their boat only to spook the fish and stop the feeding frenzy. if you see someone already fishing a school, be respectful and approach quietly, and do not motor about once you are there.
Dave.