Very broad question with very little background info. A very good fisherman once told me most fish will be in one of two moods, feeding up or feeding down! Take what you know about the body of water you are fishing - water clarity, depth, season and by process of elimination, tailor your abilities to the area you are fishing. Two hours is just the tip of the iceberg. Fish hard and move on. Sometimes they just won't bite. Eliminate water but don't miss opportunities to find that honeyhole due to frustration that you cannot get bites where you think they should be!!