It never hurts to study a good lake map, even if you're familiar with the lake. Look for the bottom contours that hold fish, paying close attention to points, humps, sunken islands and saddles near spawning areas in the main lake or near the mouths of rivers and creeks walleyes use to spawn. Females leave spawning areas first. Males linger, then follow females to main-lake structure. Try fishing the warmer northern bays with dark or sandy bottoms that absorb heat and ignite the food chain.
Plankton attracts baitfish and baitfish draw walleyes.
Always pay attention to wind direction. An in-coming breeze for several days concentrates warm water and baitfish. Walleyes use their unique eyesight, lateral lines and internal ears to feed along shorelines clouded by the wind. Don't stay in one spot for long if you don't catch fish. Move until you find active feeders.