I've always read that it's not good to directly exercise your neck. I have neck issues anyways, so I follow that advice. It gets enough work from shrugs, standing overhead press, and standing barbell rows to stay proportionate.

Shake Weight

Started isometrics where I push against the sides of my heads and resisting it.

Yeah, my physiotherapist basically gave me that excercise when I had neck pain.

You can add another dimension by pushing up against your chin and resisting and locking your fingers behind your head, pulling forward and resisting.

This is a good set of neck stretches I always send to artist friends.

Wrists are another one but I don't have a link on hand (ba dum chhh) for that.