I got busted in on Highway 20 in Grundy County a couple of weeks ago. Here are my recommendations:
#1 Drive something that doesn't draw attention.
#2 Only use the left lane for passing and then immediately move over. People that sit in the left lane are just asking for a ticket,
#3 The times when no one else is on the road is probably the worst time to speed. This is what happened to me on highway 20. 1am in the morning and not a person on the road except the cop
#4 9mph over on highways is almost always a safe speed for not getting a ticket. I've driven a lot in my life and have never been pulled over for anything less than 10 over. In town I rarely exceed the speed limit. If the speed limit is 35 than that's pretty much what I drive.
#5 If you do get pulled over don't make excuses. Just treat the cop nicely and they'll probably give you a warning or drop the speed. A lot of yes sir/no sir is a good start. They are just doing their job and I broke the law so I have no reason to be ****** at them.
I bought one of these last week. Not foolproof by any means but better than nothing.