We all have gotten spam--in our email inbox, our Twitter feed, even on our phones (there is text spam and also some forms of telemarketing, especially robo-calls). I don't know many people who enjoy getting spam and even fewer who respond to spam. Yet, we can learn from the spammers--on what does not work.

Here are the three main lessons you can learn from spammers:
<ol>
	<li>Don't underestimate the intelligence of your target audience</li>
	<li>Don't send the same message over and over and over and over</li>
	<li>Customize your message</li>
</ol>
What would you add?