My friends Border Collie used to spin constantly when she was hyper or when she was frustrated/in the backyard. Just try to exercise him as much as possible, practice all of the obedience commands (including stay, settle, and watch), and expose him to as much as possible... whatever he likes most, tennis balls, treats, or a special toy, play with that or have him focus on that when you feel a hypersensitive overload coming on. That helped the BC a lot, she was one of the most neurotic dogs I've ever met ^_~