Electrofreak's Detailed Sniper Guide
Covers inventory, implants, using the terrain, techniques, and tactics.
Nomad Jedi n00bs' Guide to Planetside
For the player just starting out. Brief descriptions of setting options, the heads-up display (HUD), basic roles, squads and keyboard shortcuts.
Warrior Nation Elite Primer
Tactics used by clan offered to the public. Includes assault maps, standard procedures, and origins and pronunciation guide for bases.