Best advice I can offer you is to tell you this.
Be an active rider. I don't mean get a workout! As in active listening, in which you focus on the person talking. Keep a watchful eye, don't make wild moves darting in and out of traffic, ride as fluidly with traffic as possible, try to know every vehicle on the road.
There's really a lot of tips I can offer, but some of the most important are these here.
>When approaching a cross street where you have no stop sign and the cross street does have a stop sign, be careful! Many drivers won't realize you're riding at 30+ MPH, which can cause a collision. This is why I have found that when approaching a cross street like I described, don't only watch their vehicle for movement, watch their rims/wheels. You'll notice the rims/wheels rolling before you notice the entire vehicle moving.
>At night, only ride familiar streets. Past dusk and before dawn are terrible times to find "new and exciting routes".
>Expect the unexpected! Be prepared for simple things to go wrong with your bike, and try to be as prepared as possible for any type of failure. I don't mean carry an airpump with you either. How I mean that is, for example, are you prepared were your chain to snap/engine to seize/hit a dog/blow a tire/etc etc?
>Just because you have a motor on your bike doesn't make it a motorcycle. There's still a bicycle to maintain under all that 2 cycle smoke. That will solve many a problem there. Ride it once, tune it twice!
>Investigate your local laws (city, county and state) as far as legal operation, be prepared to speak to your local L.E.O. while he's on patrol, and also - know the local bicycle laws by heart. You may find you have more rights than you realized.
>If you don't have a horn, get one. If you run into a situation where you NEED a horn and don't have one, I've found hitting the clutch and revving the engine can sometimes get someone's attention in a pinch.
>Stay off the left side of the street - even if only pedaling with your motor off down the sidewalk. Cars are NOT used to seeing anything coming from that direction in their blind spot.
That's all I can think of for now. Well, aside from - light yourself up like an xmas tree! Doesn't hurt when you're not getting hit.