The first thing you'll notice about X3 is the new Hints Panel docked to the right side of the display. Information about the current tool is displayed here, along with links to pertinent tasks. For example, if you select the Text tool, you'll see information about fitting text to a path, adjusting frames, editing text, and more.
Corel added many other new features to CorelDrawX3, most of which revolve around improving the drawing capabilities of the program. The curious lack of a star-making feature has finally been rectified with not one but two new tools: Star and Complex Star.