[Jim Duncan - Weather]

Depends on the game you're playing, such as the weapons and if there are vehicles.

-Practice with all weapons, and then in game, pick your two best (obvious)
-If you're playing against people with machine guns, get them from behind and once they notice, run circles around them firing on them.
-If you have teamates, set up an ambush point for the enemy, so they won't expect it.
-If using vehicles, always use the fast vehicles when the enemy is using a slow, but powerful one (like a tank).
-If the enemy is using a tank that can't be penetrated with pistol/machine gun fire, grab a rocket launcher, and attack from above, harder to hit.
-If you're going for staying alive, not necesarilly kills, stay in the high ground if possible, you can hide easier, and people have to come from below to get you, much harder than coming from above.
-For those of you who play Halo, always use the Ghost when your opponent has a tank. What I like to do, is floor it at the tank, hit it, ramp into the air, and then jump out, and rocket them from mid-air.
-Finally, always make sure you're moving, never stop, and if you do, make sure your behind cover.