When I park my car and turn it off, I usually select first gear, pull the parking brake, kill the engine, and then release the clutch pedal. I did this because I thought it would keep the car from rolling when parked, in case the parking brake somehow failed.
However, I have recently read on multiple forums that you should leave the car in neutral when you park. Is there any danger of leaving the car in first while parked? While it damage the car? Should it be in neutral?