I use a top handle (usually a 201tc) with one hand for cutting smaller wood that I can lift up off the ground with my left hand to cut to firewood length. I always keep the cut off to the side. If the wood is light enough to pick up and move with one hand, I pull the wood to the right after each cut. If not, I move to the left after each cut.
I am also very cautious with the throttle and try to keep the bucking spikes into the wood when possible. I do make some one hand trimming cuts, but like previously noted, I wear a helmet with face shield and use maximum caution.