The practice of tipping has been associated with pubs and eating establishments in 18th century England, where patrons were encouraged to toss coins into an urn, displayed with the words "To Insure Promptitude". Perhaps this was the start of the counter tip jar?
In today's society, we are often faced with the question of "Who to tip?" and "How much?". Here are some guidelines:
Food & Beverage
Restaurant Server -- 15% to 20% of your total bill, increasing the amount accordingly if you have a large party or numerous special requests.
Restaurant Take Out -- 10% of the bill.
At Home Delivery -- $2 to $5, or 10%, depending on weather, your neighborhood, and the distance driven.
At The Bar -- 10% to 15% of your total drink bill. Keep in mind that if the bar is crowded, tipping generously after each round will be more likely "To Insure Prompt Service".
A coatroom attendant should be tipped $1 per coat.
Valet Parking -- $1 to $2 per vehicle is usually appropriate, given when it is delivered to you.
Taxi -- 10% to 15% of the total fare.
Limo -- 15% to 20% of the total bill.
Airport Help
Skycaps -- $1 to $2 per bag.
Parking Shuttle Driver -- If the driver assists you with your luggage, $1 to $2 per bag.
Special Assistance -- If you need special assistance from airport staff (perhaps you are traveling with crutches or a wheelchair) you should give any employee that provides you with extra help a few dollars.
Hotel
Bell Desk -- $2 to $3 per bag for delivering luggage to your room.
Room Service -- 10% to 15% of total bill. However, often times the gratuity is automatically added, so be sure and check the bill when your order is delivered.
Housekeeper -- $3 to $5 per day, left daily (different people may take care of your room). Be sure to leave it with a note or envelope marked "Housekeeping" -- and say Thank you!
Getting your shoes shined? $2 per pair of shoes is a good tip.
Salon & Spa
Hair Stylist -- 15% to 20% of the total bill.
Colorist -- 15% to 20% of the total bill.
Shampoo Tech -- $1 to $2.
Nail Technician -- 15% to 20% of the total bill.
Massage Therapist -- 15% to 20% per massage.
Tattoo Artist -- 20% of the total cost. This is a place where you want the best work!
Keep in mind that if you purchase a meal, goods or services with a discount coupon of any sort, you need to tip on the full amount of the bill, not the discounted price.
If you have an issue with the service you have received, don't eliminate the tip altogether. Instead, speak to the manager or person in charge. If the problem is resolved to your satisfaction, tip the full amount; if not, then adjust it accordingly.