How do you find car lease incentives?

I am interested in leasing a Honda Fit, preferably 2009. I’ve read that:

To get an EXCELLENT deal, it is practically required that the car manufacturer be contributing to the deal. If you know that the manufacturer is not currently offering lease incentives, you should not expect to get an EXCELLENT deal. On the other hand, you may actually find deals that beat our EXCELLENT deal, depending on how much the dealer contributes in addition to the manufacturer incentives. If you do, you should be congratulated.

I want to put in the time and effort to finding these incentives – but I do not know where to start.

Also, if you have experience leasing cars, can you post your wisdom here? Thanks.