One thing they don't come out and tell you in the book is to make sure you have the doors closed when you do this. Here is a quick decription:
Get in car and close the door. Turn the key to "on" (not start).
With the key in "on" position, push the trip meter reset button twice quickly, the remaining miles to next service will appear. Then, hold down this same button, and with your other hand turn the ignition off, then back to "on" again. KEEP holding that button down. It will take about 10 seconds, but you will hear the cluster "beep" and the new miles (KM) remaining will appear in the odometer.