The first step in taking this picture was setting my camera up on my tripod and setting my interval timer to take a shot every 10 seconds. From there I just walked around the frame, smiled, and ignored the fact that I looked really silly!
Once I had the pictures taken, I loaded all the ones I wanted to use onto photoshop.
I picked one picture to paste all of the other self-portraits into. From there I used the Lasso tool to draw a line around me in one picture, copied it, pasted it, and then tried to match the spot where it fit as best as I could. It is kind of like putting a puzzle together. If you look at the picture on the left you can see where I have used to Lasso tool to delineate what to copy. In the picture in the middle you can see that I have pasted it but not yet placed it.
I made a second version of the picture with one more me =). Although I used photoshop, Gimp is a free photo editing software that would do just as good of a job as photoshop did.