If you don't have agency representation, getting tears is all about networking with the right people. Work with designers, photographers, and stylists to see what kind of projects are coming up that has a high likelihood of being published. If you just want to submit to an agency, you just take some snapshots and got o open call. If they tell you to work on your book, that is the time to find and HIRE a photographer who will give you the shots you need. Ask the agencies for a list of recommended photographers.