Tip 1. Remeber when he said he kept a journal ? He breaks down a body of water into sections. Section 1 he may have caught the fish on a deep crank, chartruese in color, 10# mono, 80 degrees with 3mph winds out of the north, water clarity and depth.
Then on to sections 2,3,4 and repeat. So now when he goes back to that lake he has knowledge on that lake.