Surveys can be both bull's eye and on the edge, depending on how much you get to talk to the people. It is sort of a hit or miss situation. That also doesn't mean that I wouldn't use any method that was not right on the bull's eye. You just need to know what to expect from each method, so you don't devote all of your time to less than bull's eye methods and think that you are doing the best that you can do. Obviously, the method that brings in the most patients on a consistent basis.
Marketing is a full time job.
I am not just referring to how much a method costs. Always analyze what you are doing and what gives you the best shot at a bull's eye. My return on my efforts would dictate where I put the majority of my efforts. Some methods work better for others, so you need to keep track of how each method is working for you. I would try them all, but I would also keep trying to use the methods that consistently help me to score a bull's eye.