As with anything, it specific to the type of fish and location, but if I had to pick one lure and one technique for everything, it would be a 1/4oz Shad pattern Bill Lewis Rat-L-Trap on a slow, steady retrieve along cover. Not the most exciting for bass, but very effective for many species in many different environments.

I like to use topwater lures. when the fish hits your lure you just get a big rush.