Ah yes. Black and White. Really makes you think different about things. While some compositions can be planned in great detail, sometimes a great composition just happens.
So many people don’t realize that converting to grayscale is NOT black and white. If you’re reading this, please spread the word to STOP converting to grayscale. The Black and White adjustment layer is a really good starting point for doing B&W. Nik Silver Efex Pro 2 (http://www.niksoftware.com/silverefexpro/usa/entry.php) is a great tool as well from what I’ve seen and read, though I haven’t had the opportunity to pick it up yet to try it.
Here is a Hipstamatic print converted to B&W with a B&W adjustment layer.