Skip baiting and switch baiting are two different things. Skip baits are dead baits, usually slimies or cowan young (big yakkas) tied behind a circle hook. They are trolled off the riggers, similar to lures, but with a bit of drop back or slack line so the fish can run with the bait, have the reel in gear with enough drag to stop an over run. The hook up rate is generally higher than with lures. When you get a hit, let the fish run and then slowly up the drag to strike. Hopefully you stay connected. As you are trolling the baits, usually around 4 - 6 knts, it isn't so essential to be watching the spread, but it is a good idea. As some times, the fish will look at the baits but hesitate. This is a good time to drop a livie back and hopefully get a hook up.
Switchbaiting is basically pulling lures, dredges, teasers without hooks. You need to keep a good eye on the spread and when a fish is raised, bring in the teasers while dropping back a live bait to the fish. A large lure, with a belly flap of stripped tuna sewn in is a great teaser, and really gets the fish excited if they happen to grab the teaser. All trial and error mate, but worth trying these options when you're out. Good luck.............
Dave