The easy way is always mined. Try to look unimportant, they may be low on ammo. Professionals are predictable, it's the amateurs that are dangerous. When you're ready for them. When you're not ready for them.
Teamwork is essential, it gives the enemy other people to shoot at.
If you can't remember, the claymore is pointed at you. The enemy diversion you have been ignoring will be the main attack. If your attack is going well, you have walked into an ambush. Never draw fire, it irritates everyone around you. Anything you do can get you shot, including nothing.