To become a better, more involved and knowledgable soccer player it is helpful to watch or read about as much soccer as you can.  These websites are recommended for you to peruse:

 

www.soccernet.com (all around soccer news site)

http://www.livesoccertv.com/ (soccer on television)

www.soccer365.com (all around soccer news site)

www.mlsnet.com (Major League Soccer site)

www.dcunited.com (DC United, obviously)

www.ussoccer.com (US National Soccer website)

www.fifa.com (World soccer governing body website)

www.uefa.com (European Soccer news and scores)

www.conmebol.com (South American news and scores)

www.soccer.com (Eurosport, soccer store)

New:
http://www.potomacsoccerwire.com
http://www.greenpitch.com/