Dic:take a leaf from someone's book

• Maybe we should take a leaf out of Branson's book. It's easy to see how he became a billionaire.
• When you act like that, you're taking a leaf out of your sister's book, and I don't like it! You had better do it your way.
• Don't take a leaf out of my book. I don't do it well.

1. PHRASE : V inflects | If you take a leaf from someone's book you behave in the same way as them because you want to be like that person or as successful as they are.
2. Fig. to behave or to do something in a way that someone else would.
3. to copy something that someone else does because it will bring you advantages.

.... Cobuild, http://idioms.thefreedictionary.com/leaf