Get as much info before you leave home for any body of water. Google earth will supply you a host of valuable info. Study the shape of the lake and the bank itself. Often you can see down in the water depending on the clarity of the water. Once at the lake, study the shore line. Often a steep slope above the water line will continue under the water. A gradual slop may indicate a flat under the water.
Then check your vegetation. If you have vegetation in the shallows, and it suddenly stops, this often represents a sudden depth change. This is often a honey hole area, especially if there is a long line of vegetation at the top of a drop off line. Hit the drop off hard, bass often hang just off the drop-off at various depths, especially in summer. Then look for more then one type of vegetation in close proximity to each other. Several different types together, are always better then just one type of vegetation. Then look for isolated clumps of vegetation in a big flat, this is usually better then a large expanse of weeds or pads. The reason being, the isolated clump will draw bass to one location for cover, shade, and ambush point. A mass of vegetation on a flat, they will be scatter throughout and harder to catch. Then look for culvert pipes, water intake flows, and exit flows, these will provide current at times, and position bigger bass for easy ambush points. These are a few observation I always do before ever casting a lure in a new body of water.