Post Card Mailers

We’ve decided to do a follow up mailing campaign and we are looking at doing a post card style mailer to save on some cost. My questions for the forum are:

  1. What style gets a great response rate? (our personalized letters get 9-10%. We anticipate a lot lower on post cards, but we want to maximize it)

  2. Do you guys do holiday themed mailers? (if so, what are your thoughts on these?)

  3. We are a family business, should this be something we incorporate?

  4. Is there a great service that anyone uses they would like to suggest?