Murphy's Law of self recovery winches, by cattlerepairman:
1) Any winch cable is at least three feet too short to reach the right anchor point
Corollary to 1) If the winch cable is of sufficient length, the pull angle is out of spec
2) If the winch is equipped with a shear pin, it will break at the most inconvenient moment
Corollary to 2) If you happen to have a spare shear pin, it will be a fraction too thick to fit. If it fits, it will break on the next pull.
3) "6x6" only means that you will get stuck further away from the solid road and need to walk a narrow/muddy food path to go get help. "W/W" only means the total absence of either road or foot path at the location where you just got stuck.
4) Any winch is too weak for the single-line pull you need right now to get unstuck.
5) Having a snatch block merely means that 1) is now six feet too short.
Feel free to add to this!