try this,
AF-C, single point dynamic, (if you have a 4-point auxiliary thing like how the 3/300/700 can have 9, 21, or 51 points, do that) set AE-L/AF-L to AF-ON, auto ISO kicks in at anything less than 1/500th of a second, and a preset WB, and you should be good.
That way, you can put a point on the subject, hold down the AE-L/AF-L button and the camera will just track it, and than all your shutter release does is shoot. that way your camera will continuously track all the time, regardless. when you have AF on the shutter release, after each picture, you have to re-apply the shutter to start continuous focusing again.
Those are the settings I use on my D700 to shoot running/cycling and focus is pretty much dead nuts 90% of the time.