You will be surprised how many fishers enter the water and stand still in the two depressions their feet have made in the bottom. That's OK if the water is boiling with fish and the catch is up. But if nothing happens, consider walking on - either in the water or on dry land. The simplest method is to move while fishing. The classical rule: one cast one step can apply here.
But a different tactic is to get out of the water and move on to a better and more attractive place within short distance, and hit the water there.