Take a leaf out of (one's) book American British Verb + object/complement
To immitate someone and behave in the way someone else would do
I think I should take a leaf out of your book and start a healthy diet.
He took a leaf out of my book. His idea is exactly like mine.
She usually wears clothes like I do. She's taking a leaf out of my book.
Despite having many copy versions of something, the original is the best.
To immitate someone and behave in the way someone else would do
Used to describe the imitation of others' manner or the following of others' guidance.
The verb "take" should be conjugated according to its tense.
The metaphorical meaning of the term dates around the 19th century.