Final answer:
People should prepare for old age by leading a healthy lifestyle, planning for independence and care, and saving for retirement to stay active and self-sufficient.
Step-by-step explanation:
According to Beauvoir, people should take proactive steps toward preparing for old age by adopting a healthy lifestyle, including regular exercise and proper nutrition, that will increase the chances of staying healthy and active later in life. Additionally, planning for the future is crucial, which involves making decisions about housing that provides independence and care, handling living wills, retirement planning, and medical power of attorney in advance. Embracing a positive outlook towards aging, staying informed about healthcare options, and saving for retirement are also important for facing the challenges of old age with dignity and remaining self-sufficient.