take a leaf out of somebody's book

take a leaf out of (one's) book

To do something in the way someone else would do it; to behave or act like someone else. I think I'm going to take a leaf out of your book and start going for a run first thing in the morning.
See also: book, leaf, of, out, take
Farlex Dictionary of Idioms.

take a leaf out of somebody’s ˈbook

follow somebody’s example because you admire them and their way of doing something: If you’re having difficulty with the children, take a leaf out of Sandra’s book. She knows how to control them.
Leaf is an old word for a page.
See also: book, leaf, of, out, take
Farlex Partner Idioms Dictionary
See also:
  • (someone) is not going to thank you for (something)
  • get going with
  • go (out) with (someone)
  • go out with
  • go with
  • Everything’s going to be okay
  • everything's going to be OK
  • chubbo
  • go for (something)
  • go for it