The "bus driver" exercise is where you hold a plate at arms length in front of you and rotate slowly. It's a hugely underrated movement. It's an excellent way to finish the shoulder workout and make the joint more resilient to injuries.
Start with a 10 or a 25 and work your way up to 45 pounds.
One of the world's most successful and respected bodybuilding coaches sounds off on training techniques, excessive drug use, and what it means to coach with a capital C.