What safety precautions should I follow to prevent overheating the HP EliteBook 840 G5?

Do not place the device directly on your lap or obstruct the air vents, and only use the device on a hard, flat surface. Do not allow hard surfaces like a printer or soft surfaces like pillows, rugs, or clothing to block airflow. Also, do not allow the AC adapter to contact the skin or a soft surface during operation. (Page 5)