Just keep doing it with a sense of fun. If the long session cause fidgeting try shorter sessions with breaks if short sessions get nowhere set a timer and see how long you can keep talking. In fact challenge yourself to keep going. If there scenes seem to repeat try imagining what you could do different. If there is something like a door or inanimate object imagine it could talk to you what would it say about the way it looks or what would it's message be for you.
Experiment and see, Do it with a sense of "what will happen if?" fun.
Alex
