Compare and contrast different biographies. What are the similarities and differences in the way that different authors portray the same person? What are the different perspectives that they offer? This can help you to develop your own critical thinking skills and to come to your own conclusions about the person's life and work.
Evaluate the sources. Is the biography based on solid research? Are the sources credible? Is the author biased? This can help you to determine whether or not the biography is accurate and reliable.
Look for patterns and themes. What are the recurring themes in the person's life and work? What are the challenges that they faced? How did they overcome those challenges? This can help you to understand the person's character and to learn from their experiences.