Shorter daylight hours can affect sleep, productivity and state of mind. Light therapy, also known as phototherapy, may help. It uses light boxes emitting full-spectrum light to simulate sunlight.
Conscious breath control is a useful tool for achieving a relaxed, clear state of mind.
Please keep in mind the distinction between healing and treatment: treatment originates from outside, whereas healing comes from within.
At the very center of our being is rhythmic movement, a cyclic expansion and contraction that is both in our body and outside it, that is both in our mind and in our body, that is both in our consciousness and not in it.