1. Obviously, observe all laws.
2. Approaching intersections, they want to see you scanning left/ahead/right/ahead/left. If you are cruising along, oblivious to what is going on on cross streets as you approach the intersections, you may be failed. Also, when changing lanes, LOOK OVER YOUR SHOULDER. Do not trust only your mirrors. Stay aware of what is in your blind spots, and BE AWARE OF OTHER DRIVERS' BLIND SPOTS. STAY OUT OF THEM.
3. Make sure you use both brakes, 70% front, 30% rear or thereabouts. I use mostly the front. It has most of your stopping power due to weight transfer during braking. During my road test, they had me pull over and stop. They went by me in the van about a half block and pulled over. They then had me signal, pull out, accelerate to 25 mph, and then on his signal, make an "emergency" stop WITHOUT skidding tires. I was riding a borrowed 76 Yamaha 650 Special II with a windshield, and stopped in about 20 feet, with the rear wheel almost 2 feet off the ground. [:D]
4. Stay out of the middle of the lane where the oily crap is, ride in the wheel tracks.
5. Edited to add: Here in Wisconsin, they are very picky that you signal turns properly. If you do not shut off the signal BEFORE you complete the turn YOU FAIL!!! My best friend who was a good rider I might add, failed twice on this one because he couldn't shut off the signal while clutching in the turn.
I passed 100%
Good luck!