Good memories of the Land/Nav exercise (it was an all out race) during PLDC.

Reading is good - http://armypubs.army.mil/doctrine/21...lection_1.html

Start with FM 3-25.26

Ranger beads, a decent compass, and lots of practice. Having someone set up a course with lots of points to find will keep you honest and teach you a lot about navigating terrain while trying to be true to your course and distance.