Last week I was at Grapeseed in Bethesda and I noticed the bartender using a cool electric contraption to suck the air out of the wine and preserve it longer. I think she was getting the bar ready for closing and as she was putting each bottle away, she's put a special cork in the bottle, stick the top in the device, and you'd hear its motor turn on. I was intrigued by this device, and ever since I've been looking for one for I find that I'm turning myself into an alcoholic, drinking whole bottles of wine because I can't bear to let the leftovers sit over night.
Well, I wasn't able to find the device, but I've found something else that might do just as good of a job. It's basically an aerosol can filled with nitrogen gas that spray it into the wine bottle, removing most of the oxygen, which ruins the wine. While that oxygen is your friend for the first three or four hours, while you "let it breathe" after that, it becomes wines worst enemy.
Of course, there are always those hand-pump vacuum sealers, but I've tried using them before and they never seem to work very well. I'm going to try to find these sprays somewhere around here, but if I can't find it, I'll just order some off the Internet.