I recently picked up a magazine with a great cover photo of Taylor Swift. The photo and concurrent story goes inside Taylor’s method of promotion and shows a very different side of her. Great article and also a good source product for musicians who may need a variety of products and services. The magazine is actually a catalog of venues and services that may be useful to you as a musician looking to promote your act. Although it is not a complete guide, it is well worth the $13.00 cover price.
Billboard Musician’s Guide to Touring and Promotion