SIVASAILAM THIAGARAJAN is president of Workshops by Thiagi, a consulting and training company. He is also the editor of the Thiagi GameLetter, a newsletter that deals with training games and activities. GLENN PARKER --author of Team Players and Teamwork, among other best-selling books--is president of Glenn M. Parker & Associates, a training and consulting firm that works with organizations to create and sustain high-performing team-based systems.