Have a goal? Tell someone about it. Actually, tell everyone about it.
Why keep your goal to yourself? When you spread the word about what you are trying to accomplish, people will help you. Most folks want to be part of something and, if they like you or agree with your perspective, that want will translate into action. Whether it be telling other people, blogging, sharing a contact, or introducing you to an opportunity, any little bit helps.
Of course, there will always be those who are convinced their idea will be stolen and run off to success under someone else's agency. Once a vision has been shared with the world (that is the eventual point, right?) it will be fair game for plagiarism and corruption, anyway. Like children, ideas can only be coddled for so long before you have to let them into the world to fall and scrape their knees.
Good ideas beg to be spread and people starve to hear them. They make no difference any other way.