Unfortunately, when you ask two people for towing suggestions, you usually get about 3 different answers. For instance, I used to cross the tie down straps thinking that it was safer, but after some research I no longer use the crossed strap method.
Rather than try to type all of my recommendations, I would suggest you might want to read this pretty extensive discussion on the subject from the AACA Discussion Forum.
http://forums.aaca.org/f196/trailer-...ch-272997.html