When moving forward to clear a new area look for enemies in every new angle, and don’t cheat the corners. Call of Duty beginners should also take this tip to heart. Enemies rarely hide in the open, they are generally tucked into a corner hoping that you will run by without looking deep enough to spot them.
The safest way to navigate a map is to slowly and methodically check every angle. It’s never fun to get shot in the back because you rushed your reconnaissance, it’s even worse when you get your teammates killed because they thought you checked a corner that you passed.