Lately I've been finding that airport pickup rates drop significantly in the last 2 weeks or so before arrival. So, as so many have said here previously, if you're not happy with your rate, keep checking back, they can drop by a lot.
Many of the larger hotels have rental car companies on site. So, if you only need a car for part of your trip, I suggest you try to rent there, for convenience sake. Also, you'll avoid many of the fees that only apply to cars rented at the airport.
Lastly, I've found that airport rates and fees can be so high that it you can save a lot of money by renting off-airport. I recently saved $180 on a week-long Hertz rental at San Jose by renting not at the airport, but at a Hertz office near the hotel I was staying at. When I arrived at the airport on a Friday night, I took a taxi to the hotel ($15). On Saturday morning, Hertz drove my car to my hotel, picked me up, and brought me to their rental office in a different hotel a few blocks away. I signed the agreement, and off I went, saving $180 on the weeklong rental over what any of the majors would give me at the airport. Oh, and I was able to drop the car at the airport for no additional charge.
Just some tips, hope they help.