If you have the occasional beer at work and don't have a bottle opener handy you can you your trusty stapler. Instructables user ivan_stephens notes that the steel carrier on a standard desktop stapler has a notch that works well as a bottle opener.
Note that the Instructables author mentioned that this tip works specifically for his Swingline stapler. I have a Swingline myself so I can't say with certainty if this method works with other brands of stapler.
Opening a Coke or Beer with a standard Swingline stapler [Instructables]