No matter if you are writing a diary or a blog or personal notes or self reflections or a description of what happened yesterday, I encourage you to write daily. Pour out your thoughts on paper to be read by you (and others) in the future.
Talk about the things you love or hate. Share what you dream and care and worry about. Listen to what others are saying about the same topics and construct an opinion of your own (not necessarily in this order). Take a clear, flexible position that might change as you learn more about what concerns you. (The more information you have, the more critical you can be.)
As Seth Godin would say: Don't hide. Write in public. Write for yourself. Then maybe, just maybe, what you write will resonate with your audience.