The five tricks that cops try to trip you up on.
Personally, I found that making the effort to obey the law has worked for me. My interaction with the police has been infrequent and that's the way I like it.
There's a more extensive tool for guarding your rights, the ACLU wallet card. Yes, that ACLU.
I used to carry one when I did a weekly commute to and from the Dayton, Ohio area. I rarely travel without a firearm and this was in the days before concealed carry was legal in Ohio. I don't know what good it would have done me but for some strange reason I just felt better about having some small knowledge about my rights.