I have neck problems too and one of the things I read about which I try to keep in mind is to make sure your helmet is not too low over your forehead, i.e., make sure you can see ahead without having to tilt you head up too much. Also, having sunglasses wherein the upper part of the frame doesn't obstruct your view is important. I also get neck strain from working on my computer too long - so I think tension, or lack of relaxation, has a lot to do with it.

Nina