The Printliminator is a bookmarklet with some simple tools you can use to makes websites print better. One click to activate, and then click to remove elements from the page, remove graphics, and apply better print styling. Here is the bookmarklet:
Printliminator < drag to your bookmarks bar
We used to have a quick video demo here, but Blip.tv deleted it. RUDE. Here's one we found on YouTube about it.