This video (found by luck) shows why you should always be very careful when winching.
Basics: 1-Use a heavy duty snatch block (always)
2-Open your hood (just in case, see video)
3-Use a dampening blanket on tow line
4-Do not allow morons to help you.
5-Ensure your winch is suitable for the task at hand.
Ok, guys. Throw in your tips too.