Last night, during a semi-lucid dream, I had impressive success with dream control when I tried a new method. Instead of simply willing something to happen I gave single word commands. I made a rock float in the air by focusing on it and saying "Up." I made myself fly by saying "Fly."

Btw the spinning trick works for me when I feel like Im losing a dream. A few times I slowly spun in a circle then touched the walls to re-root myself in the dream. Feeling the texture of walls and other objects makes dreams feel more real to me.