Before making a reservation for a rental car I always look for discount codes. Visa Signature credit cards now have discount rental codes for Alamo, Avis, Hertz, National, Sixt and Auto Europe. The codes are good for up to $35 off, 20% off and a free rental day depending on the rental car company. Most of these codes are good through June 30, 2012, but others do not expire until the end of the year. Here is the link.

Visa Signature also provides additional benefits when using your card to rent a car. This is secondary insurance unless you do not have automobile insurance for the rental and then it is primary.
The benefits include reimbursements to you for:
The deductible portion of your personal automobile insurance;
Administrative and loss-of-use charges and;
Towing charges.
To receive these benefits you must complete the entire rental transaction with your Visa Signature card and decline the auto rental company’s collision damage waiver (CDW/LDW) option or similar provision. Here is the link with more information about these car rental benefits. To report the theft or damage of your rental car call the Benefit Administrator at 1-800-397-9010.

Fine Print
-You are eligible only if you are a valid cardholder whose name is embossed on an eligible U.S. issued Visa Signature card. Only you as the primary renter of the vehicle and any additional drivers permitted by the auto rental agreement are covered.
-Only vehicle rental periods that neither exceed nor are intended to exceed fifteen (15) consecutive days within your country of residence or thirty-one (31) consecutive days outside your country of residence are covered.
-All incidents must be reported immediately following the theft or damage, but in no event later than forty-five (45) days following the date of the theft or damage. Furthermore, we reserve the right to deny any claim that contains charges that would not have been included had the Benefit Administrator been notified before those expenses were incurred. We therefore advise you to notify us immediately after any incident. You must make every reasonable effort to protect the rental vehicle from theft or damage.
-This benefit is available in the United States and most foreign countries. No benefit is provided for motor vehicles rented in Israel, Jamaica, the Republic of Ireland, or Northern Ireland.
-Excluded worldwide are: expensive, exotic, and antique automobiles; certain vans; vehicles that have an open cargo bed; trucks; motorcycles, mopeds, and motorbikes; limousines; and recreational vehicles. Examples of excluded expensive or exotic automobiles are the Aston Martin, Bentley, Bricklin, Daimler, DeLorean, Excalibur, Ferrari, Jensen, Lamborghini, Lotus, Maserati, Porsche, and Rolls Royce. However, selected models of BMW, Mercedes-Benz, Cadillac, and Lincoln are covered.

Marriott, Priority Club, Hyatt, British Airways, Southwest, Alaska, Hawaiian, United and Chase Sapphire all have Visa Signature credit cards. Not sure if your Visa is a signature card, just look for the word signature on the front of your card.

What is in my wallet? At least one Visa Signature card at all times. For my trip to Scottsdale it will be my Chase Sapphire Preferred Visa (the word signature appears on the back of the card). Which Visa Signature card is in your wallet?