How long is a opened bottle of wine good for?

[ltmikey]

Dear Bolillo. My advice is: DON'T! Wine is made for drinking, not for keeping. If you pop the cork, that's it. the prolonged exposure to oxygen is not going to do the wine any good. The only wine that may benefit from a night in the fridge or closet is very young and tannic/acidic wine. But you shouldn't have been drinking that yet to begin with. So maybe you should look into buying half bottles.
There are several devices that will limit the damage somewhat. Vacuvin is a good one and there's a host of similar gadgets to be had. Just don't slam the cork back in, because that way you "push" the oxygen into the wine because you creat pressure inside the bottle.