If I am going to a new lake the prep starts at home.
1). I'll go on Google Earth and look at the lake looking for streams coming in, and water release points. Then look for visible vegetation, rip rap, boulders, down wood, docks, any standing timber, funnel points between grass islands. Look for free topo maps on line. U of Florida used to have them for all Florida lakes.
2).Then I will go to web and look for recent catch rates, and any talking points about the body of water.
3). upon arriving at the lake I will visually follow the lay of the land, steep banks usually mean deep water banks, flat banks usually mean shallow water. Talk to guys at the ramp if you can stir up a conversation. Always ask about danger points to avoid. They will give that info up, but not favorite fishing spots.
4). Look for visible vegetation. isolated clumps are often better then large expanses. Clumps will be magnets for the surrounding area. Expanses will have bass scatter throughout. Summer time, the greener the better, clumps with two types of veggies combined are better then just one type.
5). Look for bird activity, a dead giveaway for active feeding fish. Look for happy water, within casting distance. Don't run to happy water, the big motor will always disrupt and disturb, I learned that the hard way after wasting much fishing time.
6). Look for current, active bass will position in the eddies adjacent to current. If the wind is blowing it will cause current, especially between clumps of veggie islands, or between types of structure.
These are a few things I do when going to new waters. Always fun trying to figure out a pattern on virgin waters. Good luck!