If there is ice on the driveway, shovel off what you can on top. Allow the shovel to slide over the ice. Get a heavy duty scraper like one in the middle in the picture below. With a good scraper the ice comes right off. Some work is involved, but not too bad. Put salt down on any remaining ice. You should have a good scraper on hand, anyway, so the expense is justified. Without the proper tool, ice is very hard to remove.