Some useful tags

<object data="mysong.mp3" height="20" width="100" type="audio/mpeg" ></object>

<big> bigger font

<blockquote> indents text/ nestable/ block element

<br /> hard line break

<div> nestable/ block element

<embed plugin

<hr /> horizontal line

<marquee text in motion

scrollDelay=n msec
scrollAmount=n pixels
behavior=scroll (default) | alternate | slide
direction=left | right | up | down />

<p> paragraph/ block element

<pre> monospace like a .txt file

Interdum volgus videt, est ubi peccat.

<sub> subscript

<sup> superscript