Doing the Multimon
ExtremeTech discusses "Doing the Multimon". Great article. Too bad they don't talk about the very cool Ultramon, which gives you great fine grained control over your multi-monitor setup including different desktop images, screen savers, and more.
Even more agregious is the fact they don't talk about MaxiVista which allows you to turn any other PC (particularly that ancient laptop you have lying around) into a second or third monitor.
I wrote about both these great tools in March.