Ahh printers. They're fine when they work, but they are quite a pain when they don't. If you're just looking for the document on how to add a printer, it's right here: AddingPrinters.pdf

When a printer doesn't work, the problem could fall in to one of two categories: Physical issues and data issues. Physical issues are things like paper jams, no paper in the tray, tray is open, toner malfunction, printer is unplugged or off, etc. Data issues are either a misconfiguration at setup (this is not the case if the printer just stopped working unexpectedly) or what I call a data jam. All printers have a "print queue" that is the list of print jobs it has received from you. This can be paused manually or automatically when there's an issue. Once the issue is resolved, you may also have to "resume" the printer. You can access this menu from System Preferences > Printers & Scanners and then "Open Print Queue" after selecting the right printer.

Also, pending print jobs can kill your battery life. If you're unsuccessful at printing, please clear pending jobs from the print queue by clicking the (x) on the left side.

Note: In the Media Center (Room 118), lab computers can only delete their own jobs from the print queue, and do not have permission to manage the printer. If there's an issue with printing in a lab, verify that the printer is powered on and has a "ready" status, then check the print queue to make sure the printer is not paused.