Sometimes a tow isn't needed.
A few years ago, i own a little 2001 white 4 door prizm. It's weight distribution contributed to it handling very well in the snow, even without all fancy traction control. One night i'm going home, compact snow and ice. Around a corner and i see a big FWD pickup had slid off the road, into the ditch. I pull up next to him and ask if he needs a hand, he eyes my little itty bitty car, but says sure. I pull back behind him, flashers on. Get out of the car walk past the pickup, then come back and looking up at him i say, "I think i can get you out of there, but it might cause a little more damage to the side of your pickup. You can just see the gears moving in his head, 'how the heck is that little bitty car going to pull my big azz pickup out of ditch', but he'd probably been expose to those wily "country folk" before and thought, got nothing to lose, and it might be entertaining. I said, straighten you wheels out until i say stop, then had him pull forward, up out of the ditch. He'd had his wheels cranked all the way to the left, trying to crawl back up and out of the ditch.