Don't buy anything
Of course, some will come and say that you should buy the tire package insurance, and it will pay for itself 2x over.
My opinion is that all of the add-ons are to 1.) make money and 2.) provide you ease of mind. If my car has a good amount of warranty issues after the first 3 years, I'll consider getting the extended warranty at that time. Other than that, nothing on my end.