There is really nothing like free advice..
What I mean by this is the following.
Right now you might be struggling with something. Your startup, your thesis, your project, whatever.
Have you thought of all the experts in the world that can help you? They are all at the distance of an email. All the entrepreneurs, all the scientists, all the teachers in the world. It might take just one email to change what you’re doing to be something awesome. Why not take the action?