One of the most helpful resources I have found are the technical papers here: Center for Dirt and Gravel Road Studies
They are all free, and the illustrations are easy to follow.
The general idea is get the water off your road instead of running down your road. How you accomplish this in your particular situation might involve ditches, crowning your road, and other methods followed up with ongoing maintenance.
Wow, holy crap......Here are a couple of pictures of what it looks like when it is in bad shape...