Final answer:
Janie Johnson can become less self-centered by developing empathy, understanding others' perspectives, and engaging in acts of kindness to gain a broader perspective.
Step-by-step explanation:
The character Janie Johnson from the novel The Face on the Milk Carton can work on being less self-centered by developing empathy, considering the feelings and perspectives of others, and actively participating in acts of kindness. For example, she can try to understand her parents' feelings and concerns instead of focusing only on her own challenges. Additionally, Janie can become involved in community service or helping her friends with their problems, which can give her a broader perspective beyond her individual experiences.