Communication is priceless. I talk to people whenever I can when I'm at a park or a school, work and my fellow detectorist. I usually find out about other detectorists that hunted before me - if the ground has been resurfaced, how old the property is, etc. I got a tip yesterday of an old school in which I found a couple of wheat pennies. Communicating helps you find more places to search and should increase your quality & quantity of finds.