Jon Sherman is the founder of the golf improvement website practical-golf.com. His website has grown into one of the leading game improvement sites in the game as he focuses on the playing aspects of golf. Jon joins "On the Mark" to share his insights on course management and avoiding disastrous on-course errors to lower your scores. The discussion centers around the decision of Driver vs. 3-Wood off the tee for success; Approach play yardages and iron play to hit more greens in regulation, and speed control on the greens to reduce 3-putts.