If towing from the front, the engine cradle is normally plenty strong. Or you can pop the hood and attach where the engine mounts attach (sometimes you just can't get under a small car when it is stuck). The back is harder because there is just enough beef to attach the suspension to. The strongest parts are where the trailing arms or equivalent suspension links are tied to the body. Good luck getting to them, though.
If you're going to drag it anyway, why not set the parking brake and run straps either through (if the design allows) or around the back tires?
The best approach is make the towee the only one to actually connect anything to their vehicle (possibly with your advice).