The publisher asks better thought-out questions and receives more complete answers in writing. Ask your publicist when they do the majority of their follow-up calls to the media, and avoid calling at those times. You'd be surprised what a kind word can do for morale. Ask them what common rejections they are receiving so you can offer new ideas. Together you can reformulate the pitches.
Publicists are creative people.
Good publicists have discovered how to become detail oriented, as well. During the planning stages, ask the publicist how they will let you know what is happening throughout your campaign. Let your publicist know your expectations. Attend publishing associations, organizations, universities, private seminars, trade shows, conventions. You can't place a value on the contacts you make and the things you learn.