Another riff on this: When people find their jobs interesting, it's almost never because someone else has sent them work they find interesting on a silver platter. The work you're being asked to do is connected to goals, processes, and people in your organization... can you find something in your environment that you have the skills and interest to improve?

A good manager will help you find those opportunities when you feel stuck, but in the end nobody is better suited than you are to find your interests, whether it's within your workplace or the world at large.