Question normal

As a medicine resident doing my ED rotation, I realized that one of the most important decisions was whether or not to order labs and imaging on a patient. That question could frequently be answered by a good history and physical, which ironically residents will often tell you they don't have time for on the busy wards. How do you sell your residents on the up-front investment of time to save on unnecessary testing and improve the overall educational experience of talking to and examining patients? And is it even possible (especially for young attendings) to have the courage of conviction to not practice defensively?