Best advice I ever got from one of my farmer clients, "Leave your truck in two wheel drive. When it won't go any farther, you can shift to four wheel drive and back out." I can honestly say that when I follow that advice, I am must less likely to need assistance. Keep a chain in the truck!

I never quit untill the running boards, differential, or air dam are on [or in!] the ground. I usually still manage to get stuck two to five times a season, depending on how much it rains.