Know Your Rights: Basics of Photographic Copyrights
At this point I have lost track how many times I have been given inaccurate counsel from other well-meaning people, such as, "Make sure you copyright that so nobody can steal it," or "If you put it online then you give up your rights and it becomes public property." Such advice will only ever come from people who don't actually understand copyright laws. When it comes to copyright issues and navigating them, the only advice worth following is advice that can be backed up by law. If you receive advice that can't be backed up by legitimate copyright law then the advice is simply someone's opinion.