On this week's Grateful and Full of Greatness podcast, Mark Glicini sits down with the man who put a lacrosse stick in his hands roughly 15 years ago. Brian Callanan sheds light on Mark's growth as a middle-school and high-school athlete, what it takes to "be the one," and the importance of process. This discussion includes personal stories and peak performance strategies that separate high achievement from mediocrity. What factors go into how an individual carries himself or herself?