Recognize that tipping is, more or less, mainstream. As corporate mentality replaces traditional ideology (that the honor of providing hospitality is reward itself), tipping etiquette has become more mainstream.
In Europe and the South Pacific, tip 10 percent to 15 percent, even if a service charge has already been added. Italy tends to be a bit lower.
In most Asian countries, don't plan on tipping. Japan sometimes includes a service charge, but don't expect to tip. South Korea doesn't charge for service and doesn't expect a tip, either.