This is the number one tip that I learned from TA, after three years of visiting Hawaii without the benefit of these forums. I used to prepay our car rental, to get rid of an expense......ugh!!! I would check back on the reservation maybe once to look for a lower price, but never would I check everyday!
This one tip has saved me thousands of dollars over just two and a half years! Our price regularly goes from $900 for 18 nights or so down to just under $300, on our last trip. That is major savings!
I do check everyday because I never know when that big drop will happen. I have experienced a huge cut in price, only to have the price go up the next day and stay high for weeks! I am so happy you are now playing the car rental game! Deb