Make the most of your paper. Choose standard sizes that efficiently maximize press image area. The more print you can fit on the pages, the less total pages you'll be mailing. Substitutions of equivalent grades can also save money, without affecting quality. It's wise to ask for printed samples of paper, not just mill samples or swatch books.
Dummies are for smart people.
Ask about different methods of list hygiene. Many lists are full of duplicate, bad and moved addresses. For a small processing fee our software can make your list as clean as a whistle. Many mailers are unnecessarily spending money for upgrade classifications. Use post-production review to help with the next job.