Honestly, since I learned how lane positioning is key to being visible and predictable in traffic, which I learned before I came to BF, I haven't learned too much new stuff. From other forums, I did learn about using the slow/stop signal in various situations, particularly in conjuction with a rear-view mirror. However, I am continually amazed at the seemingly endless irrational defenses for bike lanes on roads without long intersectionless stretches of high-speed traffic often presented here, and the lack of acceptance and/or understanding for the importance of moving left (after a look back and confirmation of ROW to do so) prior to going straight across an intersection, any intersection.