Just the right temperature.

For Storing

The perfect temperature for most beer to be kept is 38˚ F.  If stored at this temperature will retain the level of carbonation that was created during the brewing process.

 

For Serving

The "perfect" tasting temperature varies by beer, but for most beers you're good to go at any temperature between 38˚ F &  45˚ F. If you're looking to be more specific though, the Home Brewer's Association has an awesome guide for proper serving temperature for every major beer style that you can check out here.