While not a traditional portrait lighting style, windows are great for creating silhouettes.

Shoot 8 photos to create a profile silhouette of yourself in front of a window.

If you are working with a cameraphone, this will take a bit of coordination. Set the exposure for out the window with the light behind subject (you). Bring your result into Lightroom .

Lightroom App

At a minimum:

Straighten it. Under Light, make the blacks darker

Lightroom

Straighten. In the basic panel, make the blacks darker.

Post 2 best to Openlab with a description of your process. What did you have to do to get a clean silhouette? Post to lab 10 silhouette

Upload all to flickr