Head size: Match the size of head to the depth of water you are fishing. Shallower water-lighter head, deeper water-heavier head.
Head color: Match to the color of the bait. Not really a key factor in catching fish.
Trailers: Beavers are a great bait to use on wobble head jigs. Rage bugs, Pit Bosses, and Ugly Otters all works well. Paddle tail swimbaits like Grass Pigs and Swing Impacts are also great. Craws like Chiggers and Rage Craws work exceptionally well when dragged along the bottom. Experiment with different baits. Ribbontails, Senkos and grubs can all work well.
Rod: 6'8''-7'6'' M/XF or MH/XF casting rod. The extra fast action is perfect for getting good hooksets, especially with big, heavy wire hooks. My favorite is a 7'2'' MH/XF.
Reel: Just about any baitcast reel you have will work fine. 6 to 8 gear with a good drag. I use a 7 gear Shimano.
Line: 20-40lb braid or 10-17lb flourocarbon or copolymer line will work well. In clear water scenarios, use a fluorocarbon leader with the braid. I prefer Sufix 832 or Power Pro braid in 20 or 30lb test with a 12 or 15lb leader.
Retrieve: Try experimenting with different retrieves. Fast, slow, start/stop, drag, swim and hopping retrieves all work.
Good luck!