Rototiller Video
Use the rototiller to cut the dirt several inches deep by making passes in various directions. This breaks up the ground making it easier to move. Once you have moved that loosened dirt out of the way, repeat the process until you have worked down to the desired depth.
Just let the tiller do the work of breaking up the dirt. Then, you just move the dirt around.
Read the November 21, 2014 AsktheBuilder Weekend Warrior for an interesting story on this video.
Tim built custom homes and did ultra-custom remodeling for 20+ years before launching his Ask the Builder media presence. He was selected as one of the Big 50 by Remodeling magazine in 1993. This award gave birth to Ask the Builder in October 1993. Tim also operates https://DrawPlumbingPlans.com. His @askthebuilder YouTube channel was the first home improvement channel on YouTube.