Truthfully.. You need to heighten your awareness. Try going in to a private match, by yourself.. Learn the maps each one.. How BIG they are how SMALL they are.. then you should consider how SMALL they become with 11 other players running around them with you. When in matches, don't lollygag. Play as if you were actually in a real battlefield and the enemy is only out here to kill YOU. If you look at the mini-map and you find your team is spread out.. Don't go searching for them, LOOK OUT for the enemy soliders that are between you. I, at times while playing, for a few seconds.. NO LONGER THAN THAT!, press pause to check out the FULL MAP in the pause screen to see where I am & where my team is in relative to my own position, also I see where they're looking or headed to figure the enemies' general locale. Antoher tip.. If you are in a lobby with a good player, when he gets on your team shadow him if he runs past you.. peep how he moves, what he does, where HE goes.. obviously he's always at the top for a reason. Go Hard.