My guess is most of us have the same problem. Before I replaced the door weatherstrip, which is expensive, I picked up some foam weatherstrip at the local home supply and worked it in behind the rubber weatherstrip where I thought the noise was coming from. I also made sure the rubber strip at the top of the door that seals against the drip rail was sealing properly when the door was closed. This all helped, but there was still what sounded like wind noice when I drove the car. I also noticed it more when another car was next to me.

Last weekend I pried off the B pillar interior trim where the seat belt is and found there to be no insulation behind it. Since this area is right at ear level I decided to add some insulation. I had some peal and stick "boom mat" type product left over from a previous project so I used this. I haven't had an opportunity to drive on the highway yet, but around town it seemed to be quieter. This is a very easy project and would recommend those with noice issues to give it a try.