Drew Barrymore says she's still working on how to show her kids to be kind to themselves. But she has passed on one specific lesson that's "changed" her "life forever.”

The talk show host is a proud mom of two kids , Olive, 12, and Frankie, 11, whom she shares with her ex-husband Will Kopelman. In an interview with Real Simple , Barrymore opened up about her favorite parenting tips and life lessons.

Drew Barrymore and daughter attend Baby2Baby Holiday Party Presented By The Honest Company at Baby2Baby Headquarters on December 13, 2014 in Los Angeles, California. (Photo by Stefanie Keenan/Getty Images for Baby2Baby)

"We’re all works in progress. I model how important it is to be kind to others," she said. "If you’re not good to someone, you will not only ruin their day, but guess w

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