The most common time when you should tip is when you visit a full-service restaurant.
Everyone knows about tipping wait staff in the United States, even people from outside the country. However, there are many more instances in which it is proper to provide a tip.
Restaurants
On top of tipping your server, you should also tip the bartender if you visit the bar before or after your meal.
If you're picking up takeout from a restaurant, it is also proper to tip the employee who brings you your takeout order.
You should also tip any time that you have food or pizza delivery to your home.
Personal Care
You should always tip your hair stylist when you are at the salon.
Manicurists, estheticians, and massage therapists should all be tipped out as well.
Don't forget about your pets. If you have your pets groomed, dogs or cats, be sure to tip the groomer.
Transportation
Tip your Uber or taxi drivers any time you take a trip.
If you're taking care of your own car, be sure to tip the person who washes or details your car.
You'll also want to tip the valet when they return your car to you.
Travel
For vacations and business travel, you'll want to tip the airport skycap or porter if they assist you with your bags at the airport.
There are several people whom it is customary to tip once you reach the hotel. First, tip the bellhop when they deliver your bags to your room and when they assist you with removing your bags from your room.
If the concierge assists you with reservations or tickets, you should tip them as well.
Room Service
Tips should be provided for room service, but if the bill says "gratuity charge" then the tip has already been added to the bill.
Lastly, you should tip room service for each day that a housekeeper cleans your room. Leave the tip in a place where it is clear that it is for them, or just leave a note.