How do I safely place the computer to avoid overheating?

Do not place the computer directly on your lap or obstruct the computer air vents, and use it only on a hard, flat surface. Do not allow hard or soft surfaces such as pillows, rugs, or clothing to block airflow, and do not allow the AC adapter to contact skin or soft surfaces during operation. The computer and AC adapter comply with user-accessible surface temperature limits defined by IEC 60950-1. (Page 5)