4. Take more "maybe" shots. You don't have the luxury of being 100 percent certain in low-vis conditions, but if it looks like a target, go for it. Casts are for free. On a bright day, I'm all about casting economy and making every shot count, the first time. Wade into position, and set up for the perfect shot, factoring in the sun, shade, wind, and other variables. Under clouds, if you think you have a shot at what might be a fish, take it, and ask questions later.