Smallmouths often suspend over relatively deep water in reservoirs and natural lakes in summer, when baitfish populations peak. In reservoirs, they tend to follow shad or shiners. A 4- to 5-inch grub worked horizontally on a jig head can work wonders. Determine depths fish are using with sonar (or visual clues, when fish are in the top 5 feet) and choose a jig weight that matches the depth (1/6-ounce for the top 5 feet, 1/8-ounce for 5 to 10 feet, and so on). Run the grub on straight, with hook exiting on the seam. Cast, count it down to the desired depth and reel it in at a steady pace. Slow tends to be best, but not always. Heavy jigs and fast retrieves can produce better, at times.