Final answer:
The best way to check for other vehicles in blind spots is to glance over the shoulder, ensuring areas not visible in mirrors are checked for safety.
Step-by-step explanation:
The BEST way to check for other vehicles in your blind spot is to glance over your shoulder. This allows you to directly view the area that is not visible in your rearview or side mirrors. While driving, it's essential to eliminate as many blind spots as possible by properly adjusting your mirrors but then confirming with a quick glance to ensure maximum safety on the road.