Now you come up with a theme for the next contest and post an entry thread, then after a certain announced period of time (4 or 5 days I think), you give everyone a last call heads up and then you round up all those entries and post the voting thread
It has been done but there's always some repetition in these things. You won so it's your choice, you just need to get a new thread up then sort the poll out at the end.