Use this code:

<H3>3 Steps to Successful Communication</H3>
<OL COMPACT>
<LI>Tell them what you're gonna tell them.
<LI>Tell them.
<LI>Tell them what you told them.
</OL>

And get this result:

3 Steps to Successful Communication

  1. Tell them what you're gonna tell them.
  2. Tell them.
  3. Tell them what you told them.