For extra-moist grilled chicken, use a pair of tongs instead of a fork to turn the pieces. A fork will pierce the meat and let too many of the juices run out, thereby drying out the chicken.
From "Betty Crocker's Complete Cookbook, Everything You Need to Know to Cook Today, 9th Edition." Text Copyright 2000 General Mills, Inc. Used with permission of the publisher, Wiley Publishing, Inc. All Rights Reserved.