A lot of lists on the web are basically piles of vomit. But here's a list that can help you create piles of vomit: Urlesque compiled a bunch of videos that show "31 Ways to Open a Beer Bottle Without a Bottle Opener."
Some are pretty practical, like how to open a beer with a CD or a sheet of paper.
And some are not so practical like the one above.
I have my own trick for getting by without a bottle opener: I refuse to drink anything but Coors Light Cold Activated Cans. That's how I always know when my beer is ice cold.
Which is obviously the way beer is intended to be drank.