The best way I have ever known to beat a ticket is to ask the court to reschedule the hearing for whatever reason you can come up with.
I did manage to catch a young officer without the calibration information on his radar gun, he had to admit to the judge that he didn't have the paperwork with him and therefore could not prove the equipment was operating within spec. I think the state lost the next six speeding cases behind me. I met the lawyer from the DA office sometime after that, who asked if I was an attorney, he said I should consider it.