Maybe this isn't a problem everyone runs into, but we certainly have - you've gotten your hands on a bottle of wine, but you've forgotten or misplaced your corkscrew. This has been a frustrating experience for us - especially since we can open a beer on just about anything - but usually we end up pushing the cork down into the bottle and having to deal with a floating obstruction as we try to pour it.
Turns out there's a much better way, and you're probably wearing the only tool you need for opening that damned bottle - a shoe. Check out Dr. Vino for a whole slew of alternative methods for opening wine. (Thanks for sending the link to Wimp.com, Doug, but we couldn't figure out how to embed that shit in 30 seconds or less)