The biggest problem people have is their defensive from the start with cops. If you treat them with respect, straight forward answers and look them right them in the eye, let them know you know they have authority, they will generally let you go. I got pulled over in the middle of a deal, I had an ounce under the seat; cop comes up, ask what I'm doing, I said just driving around, than asks if I have been smoking any dope. Said no once again with a giggle to make it seem like absolutley not, and he let me go.