What safety precautions should I follow to prevent the computer from overheating?

Do not place the computer directly on your lap or obstruct the computer air vents, and use the computer only on a hard, flat surface. Do not allow 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. (Page 3)