As with wine, once uncorked, port's flavor will begin to head downhill. Though it won't turn to vinegar, it will not be as good as when it was first opened, so try to consume any bottles of port within a week of having opened them. There is nothing more ridiculous than a beer snob. This goes for both the consumers of microbrew who shun their noses at the traditional American breweries, and the drinkers of traditional American beers who find microbrewed beers unpalatable without ever even trying them. Snobbery and beer just don't go together.
Beer is bigger than that.
There really isn't much about drinking beer that needs to be said. Go to the local liquor store and buy a six pack of what you like best. If you like Bud or Coors, then bully for you. I find the majority of online beer information depressing. Reading about a great micro brewery on the other side of the country doesn't make me really happy.