Sometimes I hesitate to learn too much about painting for fear the magic will go away. But then I remember what Michael Cardew said in Pioneer Pottery: "The artist today must be conscious of what he is doing. Yet the inner springs of art are always unconscious. There is a natural apprehension that if one starts meddling with these and brings them out into the open, they may dry up and the shoots may wither. But it is an apprehension that must be overcome, since all mental and moral progress in the past has required the enlarging of consciousness and the widening of its field, and has been the direct result of that enlargement. However much we may enlarge our consciousness, the underlying fund of the unconscious always remains untouched, and seems in fact to be inexhaustible."
Painting is a means of combining the material and spiritual realms, and if we focus on composition, value, edges, proportion and other analytical concepts, it doesn't mean we have to let the spirit escape. It's always there, and if we honor it, the magic will be there too.
In fact, inspiration and routine work together very well. Keep a notebook open to a blank page, set aside a few minutes a day for reverie, invite the "right brain" in by playing music, make personal acquaintences among the elements of water, fire, earth, air and their various permutations (clouds, clay, incense, you name it). Eventually, meaning will walk up and greet you.