This week, Dr. Peter Marcello shares with us “Lessons from an Old Guy” describing how to remain relevant in an ever changing practice environment, tips and tricks for challenging situations, and thoughts from recent DCR journal articles. Dr. Marcello is the Chairman of the Division of Colon and Rectal Surgery at the Lahey Hospital and Medical Center in Burlington, Massachusetts. He has performed more than 3000 laparoscopic colorectal procedures including participation in the COST and ACOSOG trials. He has organized more than 160 postgraduate courses teaching laparoscopic colorectal surgery and more than 20 advanced endoscopic courses. He is currently working on innovations in the endoluminal resection of colorectal neoplasia.