The first thing to ask yourself is were you speeding?
If you answer yes, then you have the option of fighting it based on some perceived reality that you have a right to break the law without having to worry about the consequences of your actions, or you cold act responsibly and maturely and just pay the damn fine.
If you weren't doing it then feel free to fight it, but it sounds like you want advice on how to get off, not how to prove your innocence. Big differences there.
"He didn't want to tell the cop he was on his way to the Butt Pirate Palace for a little two-step with Joe-Joe during the Village People marathon." - Cat_Doc
"Cause when your hourglass runs out of sand
You can't flip it over and start again...Don't blink..." Kenny Chesney
"Take care, never leave home on bad terms, watch your back and go home in one piece." - Aussie Nathan
"The batton in my jacket is hot like a porn actor to beat someone down." - Patchcop