Nine Tips for Getting the Most Out of Your Housefile

Trollinger offers a quick way for a smaller catalog to see if a test result is valid. His “rule of hundreds” states the following: You want at least 100 observations before you can say you feel comfortable with the result.

3. Re-mail First-time Buyers Right Away

These folks are in an active buying mode, says Hochberg. “The more time that expires after the first purchase, the less likely they will be to buy again.”