It may be a simple act that might take only a few seconds but tipping can be confusing especially in foreign countries. Learn the country's basic tipping etiquette so as not to offend people by coming off as too generous or too stingy. Appropriate tipping, afterall, is a mark of a good tourist. 

EUROPE

In Europe, most restaurants include a service charge in their billing. Typically, the service charge ranges from 10-15%. There is no obligation to leave a big tip. Give a euro or two and make sure that you hand it to the waiter. This is the general custom in most European countries. In Scandinavia, however, you are not expected to leave an additional tip. As for taxi drivers, you may simply round up the change or leave an extra euro. The former is also recommended when tipping hotel staff.

THE UNITED STATES

Leave a 10-15% tip in restaurants. Consider the service in tipping; if the service was to your liking, you may leave an extra tip but if it was bad, do not feel compelled to tip. For cab drivers, tip 10-15% of your fare. Bellhops usually receive $1-$2 for their services. 

MEXICO

In restaurants, a 10-15% tip is usually included in the bill. If you see "propina" on the bill, the tip is included and you should not provide additional money. If someone hails a cab for you, carries your bags or finds you a parking space, give them a few pesos. Gas attendants usually acquire a 5-peso tip. For porters, you may give 10-20 pesos per bag; 20-50 pesos per night for the housekeeper; 50-150 pesos for the concierge. Cab drivers receive small tips because gratuity is usually included in cab fare.

ASIA

There are different tipping rules that are practiced in Asia. But the general rule is to refrain from tipping. Service charge is usually included in restaurant and hotel bills. In China, the law of the land and general rule of most hotels: no tipping. If you must tip when visiting Asian countries, keep it to a minimum as in 10-15% in restaurants, a standard $1-$2 per bag for bellboys, and $10-$20 for taxi drivers and guides.

MIDDLE EAST

The tipping culture in the Middle East also varies. If the service charge is not yet included in the bill, it is a wise choise to leave a small tip. Same goes for hotel staff, porters and bathroom attendants. Taxi drivers will not expect tips. When in doubt, do as the locals would. 

AUSTRALIA

Tipping is not customary in Australia. If you feel, however, that the service was exceptional, you may leave a small amount. In any case, do realize that tipping in this continent is not common.

GENERAL RULES:

In general, if you are in a foreign country and don't know whether or not to tip at a restaurant, it is probably best to leave 10 percent and be on the safe side especially if there is no service charge. It is also recommended to use the currency in the country you are visiting.