Rock Shox Dart 3 Servicing?

I've had my Rock Shox Dart 3 for over a year now. It probably has well over 250 miles and continues to work as well as when I first got it. I use it in all kinds of conditions including rain, mud, sand, rocks, roots, downhill, up hill, cross country, small jumps 5 to 8 feet, etc.
My question is what kind of servicing should be done after a year regardless of it still performing well without any problems thus far? OR should it be left alone?