You can call ahead to a few different dealerships to find out what promotions; they are running that can benefit you. Do it before going out to a million different places.

You can always negotiate the terms of financing later, or even pay with your own bank outside of the concession.

That's good: No matter what the car dealer financing, they are not just the best and car financing options available, so you have to apply all vehicle financing institutions and talk against each others to get the perfect deal for you.

Always purchase an extended warranty from a company with a good reputation, and a society that has allowed opportunities to many places.