Articles
Sharing what you know is one of the best ways to help people. Whether it's writing, speaking, or just talking to other designers, it almost always goes both ways.
Every conversation teaches me something too—something I didn't know I was missing. I end up seeing design, and the work around it, a little differently each time.
That's the real reason to share what you've learned. Not because you have all the answers, but because it keeps you learning too.