Every newbie professional wants a caring and supportive mentor who will usher him into his next role. But when you’re a rookie it’s a good time to take risks. Better to face criticism now so that you avoid it later on when the stakes are higher. Go out and find the most qualified and talented mentor, coach, or manager you can, and subject yourself to everything she can throw at you. Don’t run from the challenge, run towards it. If you’re terrified of a star manager in your organization, sign up to do a project with her. You may not love it now, but you’ll carry those lessons with you as you move up the ladder.