Persistence . Also, use bigger baits to target bigger fish, I've caught crappie on a DT22 and bluegill on 6" senkos, really changes your perspective on bait size when those kind of things happen. Bigger fish are going to be smarter and, in summer heat, probably less active (conserving their energy) than the smaller bass, so you'll have to find out where they are (deliver the bait to them) and then try switching baits until you find something they can't resist (or just annoy them until they can't take it anymore ). If I suspect a big fish is in a spot (from a graph or bite), I don't have a problem casting to the same spot for a while, trying different baits and different techniques/speeds or trying to bump off a particular object on the bottom, just takes a little patience. Doing all that should get you into some bigger bass eventually, but you have to make sure you have your end covered too. That means better knots, line to match the conditions, strong hooks, good hook set, etc.