3 points of common etiquette to ponder:
1. When walking down a hallway, stay to the right (unless impossible due to other circumstances such as crowds of others not obeying this unwritten rule), much like in driving.
2. Don't ride people's tails when driving. Even if you aren't in mid-road rage, the car in front of you may assume that you are.
3. Don't walk by people while talking on your cell phone. They might think you're talking to them, and say something back, which makes them feel like a major dork when they realize you're on the phone.
That is all--good day!