Lighting is a compositional element in the same way that the layout of the object meshes and their textures are. Light like you would in the real world as a start - then embellish.
If you see something in any of my images, just ask. I do more C4D at the moment but the principles are the same. Same goes for just about everyone, the people here help a great deal.

Pass no temptation lightly by, for one never knows when it may pass again!