So I'm almost exclusively a fly fisherman - for bass I either bounce some version of bead- or cone-head woolly buggers off of rocks near the edges of the lake, or use poppers when they're hitting the surface. I don't know jack about bass fishing the traditional way. Recently I have been using spin rods to chase tiger muskies though, and we use big rapalas, grubs and spoons.
I've been fishing for trout my whole life, starting with salmon eggs when I was a little kid, graduating to live grasshoppers when I was in high school, and then taking up fly fishing in my early 20s. fly fishing for trout, wherever you are, is all about understanding what they might be eating and matching it, whether it's matching the dry hatch (when you're lucky enough to be fishing when they're looking up) to nymphing (insects in their larval stage, dead drifted under the surface) or swimming streamers meant to emulate bait fish. In my experience baits like what Cameron shows above are effective on stocked trout, but the wild ones tend to avoid anything that doesn't look like something that belongs in there...
edit: spinners like what Mac suggested are money for catching big-ass trout. Biggest rainbow I ever caught (over 30 inches, 20+ pounds) hammered a panther martin in a small northern NM lake. No pic, unfortunately, but I did have witnesses...Also caught a 26" wild rainbow out of the Rio Grande on a blue fox. first cast after the sun hit the water on a November morning in the gorge, attacked it like it was personal.