Emergencies
In case of an emergency, contact your hotel manager for assistance. If you speak Chinese (or are traveling with someone who does), you can also call energency numbers.
Police:110 Fire Department: 119
Hong Kong is an incredibly safe place-day and night. The police do a good job maintaining law and order, but there are still a few pick-pock-est about, especially in Tsim Sha Tsui. So exercise the same caution you would in any large city: be aware and avoid carrying large amounts of cash or valuables with you, and you should have no problems.
Bank & Currency Exchange
Cash and platic are the way to go in Hong Kong. Banks and some hotels accept traveler's checks, but local restaurateurs and shop assistants won't be interested. Major credit cards are widely accepted though they may not be accepted at small shops, and in some shops you get better rates paying in cash. When adding tips to restaurant bill, be sure to write "HK$" and not just "$."
Business & Trade Services
Hong Kong has many business centers outside hotels, and some are considerably cheaper than hotel facilities. Other cost about the same but offer private desks. Amenities include a private address and phone-answering and forwarding service. Many centers are affiliated with accountants and lawyers who can expedite company registration. Some will even process visas and wrap gifts for you.