It’s common to want your job to give you a sense of meaning and purpose. When that isn’t happening, one solution is to redesign how you do your work. Often unofficially, some people emphasize more of the tasks they enjoy, such as mentoring new hires or doing public speaking, and less of what they don’t like. Some people try fresh approaches to old tasks, while others break the monotony by deepening their relationships with clients or colleagues, Sue Shellenbarger writes.