Marissa Mayer

When there are better players around you, you get better.

Find allies rather than adorers. Adorers will point out everything you do well. Allies will also be honest with you when they feel you are making mistakes or not living up to your potential.

Do something you're not ready to do. In pushing through that discomfort you'll learn a lot more about yourself. You'll learn to do something you didn't think you could do, or you'll learn where your limits are. Either is valuable.

Sharing leads to connections, connections lead to collaboration, collaboration leads to creativity and innovation. Creativity and innovation are what change the world.

Find the smartest people you can and surround yourself with them. Smart people will challenge you to think harder and in entirely different ways.

Find allies rather than adorers. Adorers are people who fawn over you but never tell you when you screw up. Instead, seek out allies who are honest with you when you feel you are not living up to your potential.

Find the courage to do things you are not ready to do. Doing something you are not ready to do isn't comfortable. But in pushing through this discomfort you will learn a lot more about yourself.