When you get any kind of air strike communicate that with your team, try to see if anyone is close to getting a UAV. Dropping an airstrike without a UAV up is a crapshoot.
Predator Missile, on maps with lots of buildings wait until your team kills 2-3 people in somewhat quick succession. You typically don't respawn in buildings so this is an easy multi-kill. Some might see bombing spawns as cheap, but whatever it helps you win.
Pay attention to your radar, and where your enemies are positioned. If you notice a lot of orange blips in the way you are headed you might want to consider a longer flanking route as opposed to a head on engagement. The chances of you winning a 2, or 3 on 1 are slim in a frontal assault unless you are a COD god.
Check your corners! rushing into a building is a good way to get your ass killed, approach the door frame from an angle, and then "slice the pie" by strafing towards the opposite frame and aiming towards the opposite corner.
In domination when an enemy is capping a point your team controls lead off with a flash bang and flank them. If you have a frag left throw it while you are moving into position to get the shot.
Aim center mass with non-snipers, this will ensure that the recoil of your gun naturally draws the gun towards the high damage multipliers at the top of the torso, neck, and head.
aim high center mass with snipers, hitting the upper torso is a one shot one kill and is much easier to pull off than a head shot.
Don't be afraid to fire from the hip at close range, it's usually more effective than bringing up your sights.
If you are sniping don't stay in one spot overly long. Get 1-2 kills and find another spot, your enemies will know where you are from the kill cam, and with the new maps there are no shortage of ways to get payback on a sniper who stays in one spot too long.
I would highly recommend the M4A1 w/ red dot to newer players, pair this with sleight of hand, stopping power, and steady aim. The gun is potent at most ranges, has little recoil, and a decent sized clip. Stick with this until you are comfortable enough with the game to try other things.
Edited by Rage Quit FTW, 13 November 2009 - 01:48 PM.