At a four-way stop, I waited for the car on the cross street to move, then entered the intersection. The driver behind the first car did not stop or slow down but simply followed the first car through and broadsided me.
Lessons: Don't assume cross-traffic will obey the stop.
Beware of Friday afternoon traffic, when drivers are hurrying to start their weekend and are likely to be making plans on their cell phones instead of looking out for cyclists.