There are many other tags in HTML.
<hr> tag makes a horizontal line. Use it after a
<p> tag, or before an
<hx> tag, to break up sections of your document. Like this:
<p>Question: why did the turkey cross the road?</p> <hr> <p>To prove it wasn't chicken.</p>
It looks like this:
But wait, there's more!
The Mozilla Development Network has good references for HTML, and other stuff.