Today I tried my hand at creating a voice over video. (Laugh all you want- I am easily discombobulated under pressure).
Farmer carries are a fantastic exercise to build overall strength and stability. The overhead variety in particular is effective for building stability throughout the shoulder girdle (for instance, the muscles of the rotator cuff and shoulder blade stabilizers). It also provides a unique training effect to the core musculature to maintain a neutral spine and, as a bonus, the 1-arm variation challenges the opposite side as well as it fights to keep you from tipping over.
Without further ado: