Listen to see if your toilet makes a flushing sound between plunges. This may indicate that the pipes are unclogged and the water is moving normally.
Look in the bowl to see if any toilet paper or waste is still there. If the water is clear, then the blockage has likely been removed.
Flush the toilet to see if it works properly. If you are concerned about overflowing, place towels on the floor around the toilet to soak up any mess.