Using one photo as the background and focal point

 

Reflection: I started by creating a black background to drag the image of the watch onto. Free transform allowed me to resize and give the watch a 3D perspective. Then I created a new layer and filled it with black while I had the watch selected. I lowered the opacity of the layer so it appeared in the background. Another new layer was created and filled with black and I created a box selection. Feather selection gave softer edges to the box and it knocked out a skewed watch on the layer beneath. Then I used the same watch picture for the bottom picture of the watch that you can see more clearly.