It's also very important to be aware of "primary" vs. "secondary" coverage offered by the credit card. My own car insurance covers me for any vehicle I drive in North America, which includes rental cars. They will even cover a car I rent for work even though I do not use my own car for business purposes. Some car insurances may not do this, making the credit card "secondary" coverage completely useless should you find yourself in an accident while on a business trip. Well worth looking into!