You've got to block out all distractions when you train. Your focus has to be 100% into the rep. You've got to get into a zone. You know you're in the zone when guys in the gym look you in the eye and then quickly turn away 'cause they see the fire. You've got to be all business.
I idolized all of the bodybuilders who came from that old-school hardcore era. Those guys didn't need any fancy equipment; they trained with intensity and focus, regardless of the gym or other limitations. These guys could do presses with pails full of cement and still get a great workout.