Copyrighting?

[soc_puppet]

Is there anything more complicated to copyrighting things than just slapping "Copyright [name] in [year], no unauthorized reproduction," all that jazz, on the end of whatever? Because that's about all that's holding me back from putting a couple of my crochet patterns up for sale.

Edit: Checked with Mom, the answer is "Yes, that's all you have to do." Should've known to check with the librarian first :P (She also says, "You can register your copyright by sending a copy of it to the Library of Congress." Good to know!)