To reiterate what has been said, the best advice for dealing with stop-and-go is to change it into slow-and-go. This will be a benefit not only to your FE, but will also decrease the risk of accidents, which are typically cause by people who speed-and-slam(brakes).

By accelerating slower and deccelerating slower, you have a damping effect on the traffic behind you, so that it moves at a more constant speed. They say that the major cause of accidents is not so much speed as it is change of speed. Driving this way tends to reduce those changes in speed.

It will also do wonders for your blood pressure, and for the blood pressure of those in your lane who realize that you are going just as fast as the guy in the next lane, and thus fall in behind you. It may aggravate and raise the blood pressure of the super-impatient jerks who cannot stand to have more than twelve inches between their front bumper and the rear end of the car ahead; but expediting their departure from our fair planet may not be that bad a thing after all.

The side benefit of all this is that driving in congested traffic this way can have a positive effect on your FE, because slow-and-go can be the one of the best situations for getting great mileage.