I agree with marybee... A lot of the cyclists I see are not riding safely. It's my belief, especially if I'm commuting/riding in a busy area, that I should make myself as visible and predictable as possible. I am smaller than a car, and the fact is some drivers don't anticipate us. I try to make eye contact with cars that are nearby so they know I'm there as well, I'll wave at people and I will acknowledge those who do me any sort of courtesy on the road (giving me the right of way for example, waiting for me to pass before turning onto the road, etc). While it's still possible that I'll get into an accident, I am fairly positive that I'm riding in such a way that it will not be my fault.