It is not proper slediquette if you start sledding before the path is clear, nor is it proper slediquette to walk backup the hill in the center of the path.
Having proper etiquette when updating ones Facebook,Myspace,Twitter,ect. status'. This would involve things such as, not updating too frequently, not name dropping, talking shit about another person,posting your daily routine ect.
The set of rules for having a bowel movement in someone else's house, or possibly a unisex restroom in a public place, intended to minimize the annoyance of others.