If you really want to look like a pro, download the Tournament Director from
www.thetournamentdirector.net & hook up a TV or projector to display the information. This will be really valuable for beginners, too, since you won't have people asking "What are the blinds now?" & "How much are the white chips?", etc.
This will also stop you from looking like the bad guy every time the blinds go up. (As the guy with the stopwatch usually does to newbies.)
Good luck.