Kate is such a wonderful person! She does a lot of volunteer work in her community helping the homeless and under-privileged children. I think more people should follow Kate's lead and help people who need it most.
If you are trying to get into shape and be healthy, you should follow John's lead. He exercises often and eats lots of fruits and vegetables.
To follow someone's lead means to do as someone else does, to use someone as an example.
"To follow someone's lead" is a common idiom used by native speakers. Practical idioms like this can be learned from LSI Speaking books like "Reading Connections," which is used to teach the Level 3 Reading/Vocabulary classes at Language Systems. For more information please visit: www.languagesystems.com