User blog comment:Griever0311/Ask A Marine Part Quattro/@comment-1260687-20100330223948

@Dolton:
 * Keep at full magazine in your weapon as often as possible.
 * Focus on one thing at a time; don't try to reload while running, for example, unless you absolutely must.
 * It's easy to develop tunnel vision after putting down a hostile; stay focused and track side to side after nailing a target to "break" the mental lock and give your eyes something else to focus on, and maintain awareness of a larger frontal target area.
 * Keep an eye open for microterrain; low walls, hollows in the ground where water is standing, small piles of bricks/rubble, mounds of dirt - a little cover is better than no cover.
 * Before you leave cover, know *exactly* where you're going; pick a spot to go to before you leave the one you're at, and make sure that it will provide defilade from hostile fire.
 * Stay low and keep your head down when you move, and keep your gun up; if your weapon leaves your shoulder, you're doing it wrong - if a hostile presents himself, you've got to e ready to cap his ass.