Google Gmail Power Tips from ExtremeTech: "This article is an excerpt from the upcoming ExtremeTech book Hacking Gmail. This Chapter shows you how to accomplish keyboard shortcuts, plus addressing, filtering, and advanced searching in Google's slick email service."
Plus Addressing combined with Fitlering was something I hadn't heard before. I use Fitlering already, but this could make it even more useful... Specially when you think of making a different email address for every vendor registration. That way you can see where the junk mail is coming from. :)