You're firing on all cylinders personally and professionally—inspired and motivated. Then, suddenly, you aren't. Things become very, very difficult. You're in a rut.
I've developed a useful set of principles for managing these swings and working out of them. My three-step method to work out of a rut: (1) Stop digging, (2) Change direction, and (3) Create movement.
Ruts will happen. When they do, slow down and allow yourself to work through them. The worst thing you can do is push the engine harder and risk taking yourself out of the game for a longer period than if you had worked through it.