Bart:
I've logged well over 18,000 miles trailering my speedster.
The wheel straps/baskets (if you have them) is the best and easiest way to go. Flop 'em over, cinch them down tight and you're good to go. Remember to re-tighten after the first five miles or so as things tend to settle out.
If you don't have wheel straps/baskets and will be going with frame straps instead, then put the front straps around the lower torsion bar just to the outside of the torsion bar mount and then go to the opposite side of the trailer so that the front straps are crossed to keep the car centered no matter what. Cinch them lightly but evenly for now.
Now go to the rear and slip the straps over the transmission horns (rear-most part of the frame) but do not cross them (if you do they'll rub on the bottom of the sump plate - a no-no) - just run them back to the loop on either side of the trailer and bring them up reasonably tight.
Now go back to the front and tighten things up really good - no more clicks on the ratchet. You can re-check the rear straps for no-more-clicks on the ratchet, but they should be tight already.
Remember to re-tighten everything after 5 miles or so and after that it should be good for the day.
You'll have to play with car placement front-to-back on the trailer til you get it to where it feels good, doesn't porpoise and doesn't sway back and forth because the rear is too heavy, but that doesn't take long - you'll feel it when it's right. I used to load mine nose on and lined up the center of the hub caps with the rear edge of the fender, but all trailers are different.
Good luck! gn
BTW: strapping this way mostly eliminates any up/down movement or bouncing of the car while being towed. Everything is rock-steady.