Hertz is now live with their fall rental promo. One way car rentals to Florida (from points north) at $9 a day. This year you can also drop off in Atlanta in addition to the usual Florida cities, see this link for more info.
Note that more northern cities come into the promo on Oct 9, and then even more on Nov 27. You have until Dec. 10 to drop off the car in Florida or Atlanta.
We have distilled our top money-saving strategies for saving significantly on car rentals in a reference list for our readers in our Tips and Tricks page. Do let us know what tips you have used to get a great deal on car rentals, as well !