Two areas to watch. If on a bike/walking path, parallel to the road, where cars come out of developments, they do not always stop at the stop sign prior to crossing the bike/walking path. Due to poor design, once the car is waiting to make a right or left turn, it blocks the bike path. This may also apply to sidewalks, which are very dangerous, because drivers truly are not expecting a cyclist.
Another dangerous situation is when there is no bike lane and you have cars in a right turning lane. There may not be enough clearance between the two lanes.
Observing drivers, on the way to work, more than half are on cell phones, texting, or putting on make up. Only a very few I noticed actually signal a lane change.