Once that was done I began adding more support to the inner (bottom) walls of my dresser... including the opening on the bottom back. After this is done I placed my final piece on top and nailed/screwed it into place.
Next step... (this was probably the easiest step) actually adding the legs. You have to have the hardware to attach the legs. It makes life so easy. I first pre-drilled some holes so that screws easily went in. From there I attached the hardware.