To store your favourite locations, like home or work, you need to be a registered Yahoo! member. If you don't have a Yahoo! ID, visit the sign-up page.
After you are registered and signed in to Yahoo! Maps, click the "Edit/Create My Favourite Locations" link to save addresses for future use. Store as many addresses as you would like and label them (for example, "Joe's house" or "the gym") for easy access.
After you have entered your favourite locations, scroll down and click "Finished" to return to Yahoo! Maps.