Driving under the influence of alcohol is illegal and dangerous. Always have a designated driver or call a ride-sharing service if you are going to drink.
It is illegal to drive in the US without a valid driver's license. Driving without a license can result in fines, jail time, and license suspension.
Gun laws vary by state in the US. It is illegal to carry a gun without a permit in many states. Carrying a gun without a permit can result in severe consequences.
Do not joke or make inappropriate comments about airport security in the US. It is taken seriously and you could get in trouble. Respect the security operatives and follow all the rules and regulations.
Tipping is customary in the US. Leave a 15-20% tip for good service, and speak to the manager if you received poor service. Not tipping is considered rude.
Jaywalking is illegal and unsafe. Use crosswalks and obey traffic signals.
Recycling helps the environment and can save you money. Separate your trash and recycle when possible.