This is more of a public service reply.
Never consent to searches. The police can still search if they want for whatever reasons they want to make up: officer safety, they smell something, etc. But by not consenting, the door is still open to invalidate the search in court. If you consent, that door is slammed shut.
That's the atmosphere they want to create: "Why aren't you being reasonable? Just cooperate and this will go well." That's a straight up lie. From the second they decide to pull you over, they are looking for ways to charge you with something. Be polite, give license and registration, obey lawful orders, but do not consent to any searches and DO NOT TALK TO THE POLICE, beyond pleasantries.
Talking can never help you. You cannot talk your way out of being arrested, but you can talk your way into a conviction. Do not answer questions. Every single question is intended to help build a case against you. If you're asked to do a breathalyzer but haven't been drinking much or at all, do it, otherwise you lose your license for 180 days (in MA, at least). Decline all roadside tests: they are difficult even when sober, are not compulsory, and your refusal is not admissible in court. It can ONLY hurt you to do roadside tests, never help. Remember, innocence is the presumption in the USA (for now).
All of you with nothing to hide, all of you innocent folks: this post is ESPECIALLY for you. By keeping your mouth shut ("Officer, my lawyer has advised me not to answer questions, sorry") and exercising your other civil rights, you may cause a bit of friction during a stop (if you're polite, that's less likely), but if the kid who detailed your car last month accidently dropped a little baggie of cocaine under the back seat, you'll be glad you followed this advice. If you consented to the search, you're in hot water when it's found, but if you didn't, they'd need to show probable cause or the search is not valid. Tinted windows and FL plates is not probable cause.
Anyway, hope this helps some.