#4: Walking Etiquette
Walking on a sidewalk is essentially a street for people without vehicles. When you pass another person on the sidewalk, it’s common courtesy to pass one another on the right-hand side (at least here in the United States).
A few people don’t understand this concept, and they always end up bumping into other people. Everyone should follow an unspoken rule: if you try to outflank someone to your right, it disrupts the convention and increases the likelihood of a collision.