One of the most important tips I can give: know the levels. Also, learn how to score in them. It never ceases to amaze me how many people take the key to the wrong place in the Rock or how many players don''t know where the control room is in Havoc. Do your teammates a favor and read the DOCs. Or at the very least, don''t pick up keys/flags if you don''t know where they go. There''s nothing more irritating than watching a teammate in the Rock bring the key to YOUR base. It''s also important to know where the choke points and Sniper / Sentry hideouts are. If you know where to expect the enemy, you''ll probably find a way to surprise THEM instead of vice versa. Also, I''ve found it much easier to bounce grenades into areas with Sentries, rather than attack one head on. :)