Optimization of training and teaching methods in colonoscopy at all levels of experience is critical to ensure consistent high-quality procedures in practice. Competency in colonoscopy may not be achieved until more than 250 colonoscopies are performed by trainees. Such tools as computer-based endoscopic simulators can aid in accelerating the early phases of training in colonoscopy, and magnetic endoscopic imaging technology can guide the position of the colonoscope and aid with loop reduction. Periodic feedback and retraining experienced endoscopists can improve the detection of colonic lesions.