Check out this excellent B&H seminar by Jerry Ghionis, a world renowned wedding photographer.

This seminar is not exclusively for people interested in wedding photography but would appeal to anyone who is interested in how to properly and effectively use available lighting to create an image.  Ghionis illustrates the techniques he uses to create his images and he does this in a fun and fast-paced way.  The seminar is almost two hours long, so it takes a bit of a time investment, but it is definitely worth it.  Highly recommended.