MetaBattle is back with yet another guide: http://metabattle.com/wiki/Guide:How_to_be_a_successful_PUG
A big thanks to Billaboong for writing it! Feel free to register and edit typos/grammar mistakes if you find any.
WvW | sPvP/tPvP | PvE/Dungeon – Builds:
http://metabattle.com/