Good exercises for shoulder maintenance?

[Tactile]

I brought this issue up in another topic about the amount of shoulder problems that a lot of lifters seem to have. Could someone please list some good exercises for maintaining healthy shoulders? I heard of Cuban Rotations before, but when I investigated I found there were several different descriptions of how it's performed..and I gave up.

 

[bignate73]

"L" rotations
Askem windmills here