I too am both a driver and a cyclist, but more of a cyclist. I ride about 8,000 km a year and have had a few minor collisions with cars and some near-misses. I found this guide for New York cyclists on the internet about a year ago, it seems to be useful.
Be:
Predictable. Use hand signals to communicate intentions with drivers. Don't do sudden turns.
Visible. No ninja stealth stuff! (I use Dinotte lights - from the USA), and wear bright clothing which has reflective tape. Also, ride where cars can see you.
Assertive. Expect drivers and cyclists (yes, even youself) to follow the rules and to drive safely.
Alert. Be aware of what's around you and of potential problems. No headphones, no phone, no texting.
Courteous. Overtaking bicycles sucks, so no 'filtering' through cars at traffic lights. Acknowledge kindness with a smile / wave. I try to ride fast but don't 'hog' the lane, especially in winter.
Bicycles and cars are not the best bedfellows but with communication and consideration from both sides they can get along reasonably well.