In her book "Bird by Bird: Some Instructions on Writing and Life," Anne Lamott emphasizes the importance of understanding characters deeply. She encourages writers to consider the small details that reveal a character's state of mind, such as their actions, expressions, and bodily posture during different emotions. These nuances can add depth and authenticity to storytelling, making characters relatable and compelling.

Additionally, Lamott prompts writers to think about their characters' choices and values, like how they might behave if faced with mortality, reflecting on their priorities. By exploring aspects such as political beliefs and personal habits, writers can craft well-rounded characters whose lives resonate with readers, allowing for a more immersive narrative experience.