In some ways however you might be the victim of your camera being too good. Unsharp mask is not the answer, but quite simply, shrinking the picture can work wonders.
Consider now the Nikon D4, the flagship camera but one with only 16MP. It has lower resolving power so your final image is less sensitive to a mistake when viewed at 100%. Uncompressed file sizes are 44MB, less than half that of the D800. Remember too that the D4 is the more expensive camera and a D4 sized image is acceptable to media outlets the world over.
Anyway, I use this to illustrate the point. If you take a picture with a D800 and there's a little blur at 100%, you can shrink the file size to less than half the original and still have a file that is larger than that produced by a D4. Unless you are going to use it for a billboard campaign, the chances are no one is going to mind the fact that you've shrunk it a little. In fact, since very few people are interested in a JPEG that takes up 25MB of disc space, most people will be grateful.
It's a great way to rescue a picture that's there, but not quite there. The ultra-resolution of cameras like the D800 is not always your friend.