For sure, get some convex mirrors. They give a much wider field of vision, and are useful when driving also, in helping eliminate the blind spots. Also try swinging your mirrors all the way open on the truck. And finally, always back turning the trailer to the drivers side whenever possible, that way you can always see the back end of the trailer either in the mirror, or by looking out the door or window. Just a couple of hints that seem to work for me. Good luck!