Check out [TextExpander](smileonmymac.com/TextExpander/)'s new "Fill" functionality. _In_. _Sane_.
My love for TextExpander knows no bounds.
Pasties for the three snippets I mentioned (which need to be tweaked for your own setup):
* [youtube embed](pastie.textmate.org/867327)
* [mp3 embed](pastie.textmate.org/867326)
* [flickr link with credit](pastie.textmate.org/867322)
[Make Link](addons.mozilla.org/en-US/firefox/addon/142) is an indispensable Firefox extension that lets you grab a customized, marked-up, "one-click" pasteboard of the current web page (including variables for title, URL, and quoted text).