When you check in to a hotel, grab a business card and put it in your purse or pocket. It usually has the address and almost always has the phone number on it. That way you won't wonder if it is located on Jefferson Street, Jefferson Court, or Jefferson Avenue.
Plus, you can show it to the taxi driver for your return trip to the hotel from the restaurant or wherever you have been.
It's also a good idea to ask the hotel concierge the approximate cost of a taxi to your destination. It never hurts to know what your fare will be.