What do photographers need to do to protect and document their copyright?

In Part I of my copyright series, “I'm not a "Pro." Why should I worry about copyrighting my photos?” I discussed why both professional and amateur photographers, and even weekend vacationers should seriously consider taking measures to raise the level of their copyright and other protection for their photographs.

In this article, the series continues with practical suggestions to protect your photos and establish your copyright firmly. In the next, (last) article in the series, I will discuss copyright registration in the US, how and when you can, and why you should, register your photographs, and if your copyright is violated, what remedies registration extends to you, that you otherwise wouldn't have.