To Make Improvements You Need to Test!
To make improvements you need to test. Test only the big impact items. Design the tests to be statistically valid. Tests, which we suggest, are:
Titles and tag lines
Timing – Lead Time
Copy benefits
Creative design and Media
Package design (self mailer, post cards, envelopes, brochure, catalog)
Offer (discounts, premiums, terms, payment)
Price Point
Re-mail tactics