Pouring and enjoying : Begin your beer pour down the middle of the glass and, as the head forms to your satisfaction, slow down as you shift to pour from the side. Leave a little open air at the top of your glass in order to smell the beer and swirl it in your glass. This releases carbon dioxide fizz, which carries the aromas of hops, malt, and fermentation out of the beer, into the foam and to your senses. Gently inhale as you quaff your brew—you'll notice exciting shifts in flavor and aroma balances as you drain your glass. Look for floral and spicy-herbal hop character, sweet malt, fruity fermentation, bold, complex alcohol, and other intended surprises.
Freshness : People ask me all the time what my favorite beer is, and I always reply that it's the freshest beer wherever I may be. Check freshness dates like you do when buying milk, and purchase beer within 90 days of being bottled or within the manufacturers Best Before date. (Most brewers provide a freshness date on their package.) Buy from the refrigerated section, only buy what you will consume in a week, and keep the beer in your fridge. Remember that beer is liquid bread—you wouldn't buy a three-month old loaf and expect it to taste good.
Glasses : Every brewer wants you to fully experience the pleasures they have brewed in each of their beers. For aromatic, hoppy, or strong ales and lagers, try glassware that resembles a brandy snifter, trapping the complex and tantalizing aromas released by the carbonation. Elegant beers are enhanced by slender and thin-walled glassware. Hearty ales and full-malt lagers do you well in hearty straight-up glasses or handled mugs. For barrel-aged and/or very strong brews, try short-stemmed wine-type glassware.
Temperature : Yes, ice cold light lager does taste great on a hot summer day at the ball park, but when enjoying a well crafted American brew, English style ale, or a spicy Belgian-style beer, make sure that you serve the beer between 45-50F (not 35-40F where most American's set their refrigerators.) Lower temperatures may add to refreshment, but it lowers the perception of flavor and aroma—numbing the tongue. Allowing a beer to warm up a little will go a long way to releasing the flavors locked inside.
Culinary uses : The most famous that comes to my mind is Carbonnade, a traditional Flemish dish. It's basically a beef and onion stew that simmers in a dark beer for hours. Acidic beers, like Flemish sours, tend to work best as they soften the meat. But dark Abbey type beers can be used too, just with the addition of a touch of malt vinegar. You do need to be careful about cooking with bitter beers, especially in a reduction or long simmer of any sort as the bitterness will override the other flavors of the dish. India Pale Ale makes a good chicken marinade.