Wise words from the "momager"!

Kylie Jenner -- who at 18 years old is worth a reported $10 million -- told ET on Friday that she gives credit to the guidance of her mom, Kris Jenner, for showing her daughters how to be "great businesswomen."

"Be nice to everybody, and just behave well," Kylie said is her mom's advice. "Do what you love. I like to do stuff that I'm passionate about and believe in."

WATCH: Kylie Jenner Takes Her Fashion to Another Level With Skintight, See-Through Jumpsuit

"I feel like she has a huge influence on all of us," Kylie added of Kris.

As for Kylie's business ventures, she's got a newly announced mobile game app with her sister, Kendall, as well as her "Sinful Shine" nail polish line.

"I always change my hair for my mood and I feel like I always change my nails for my mood," the reality star says of her line. "So I wanted to give a huge diversity of colors."

WATCH: Kim Kardashian Lectures Kylie Jenner About Being 'Professional' at Kanye's Fashion Show

So Kylie!

Meanwhile, Kylie hit up New York Fashion Week on Wednesday in a stunning see-though jumpsuit.

Watch the video below.