Some benefits of proper food storage include eating healthier, cutting food costs and helping the environment by avoiding waste.
Beer should always be stored upright to decrease the oxidation process and prevent contamination from the cap.
If you choose not to refrigerate your beer, be sure it is kept in a cool dark place that is at a constant temperature.
Some other possible traits of expired beer product are a change in the color of the beer or a "dusty" settlement visible in the bottom of the bottle.
If these things are going on in the bottle, the beer has most likely gone bad and the taste will be "flat" and possibly spoiled tasting.
Usually this means a cool, dry place around 50-60 degrees Fahrenheit away from any direct light; so basically the opposite of a store shelf. Beers high in hops or low in alcohol (under 6% alcohol by volume) typically are best consumed relatively fresh.