Two tips for buying the best tasting beer no matter where you shop (LATimes)
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There are two tricks for buying craft beer at spots that may not be your first choice for beer buying. The most important thing to do is check the bottles for date codes -- this is a great habit to get into whenever you buy beer. You wouldn't buy a jug of milk without checking the expiration date; you should give beer the same caution (even though expired beer wont make you sick, it may just taste off).
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The second trick to ensure the best tasting beer is to be mindful of which styles youre buying, if you're shopping at what might be questionable sources. Some beer styles can weather a long stint on a shelf better than others. More malt-forward styles like stouts, porters and brown ales stale more gracefully than hoppy beers that are best as fresh as possible. Belgian and Belgian-style beers are often bottle conditioned, which protects them from going stale, and higher alcohol brews are more rugged than lighter products (though even a 10% double IPA will go south quickly).
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http://www.latimes.com/food/dailydish/la-dd-know-your-beers-birthday-20140425,0,7271168.story
Where to find 'bottled-on' or 'drink-by' dates on the bottle, by bewery:
http://drinkingfresh.com/list
Probably the most useful thing I'll learn today...