If you've ever wanted to frame a page of your website on another site or another area of your website for any reason, attempting it in Joomla may have given you fits as there's no obvious way  to do it without also pullng in your pretty header and columns. 

There is an easy answer that can be pretty handy - notice most content item URLs have "index.php?..." - just copy the URL you want to use elsewhere, and add a numeral "2" after 'index' and you'll pull just the content and not the template layout. 

So, your link would then be "index2.php?..." - try it now!  This has been useful to me when I worked with customers who had a Joomla site and a few non-Joomla sites - this hack was used to pull in lead generation forms and articles for viewing thus avoiding the 'duplicate content' worry in your SEO.