Make It "Exclusive"

People want to be part of the "in" crowd; it's instinctive. Driving response on the Web is about creating that exclusive sense...that's why the word "exclusive" appears in millions of subject lines and results in 24 percent higher open rates than emails without that precious word.

Samples of "exclusive" email subject lines include "for Insiders," "private event," "select customers," "for 2 days only," "free shipping ends tonight" and "exclusive secret sale."