When i was out of topic and i cannot understand what to do then i close my eyes and look at the near world in my mind what is going on and just thinking what should be done for better improvement. Then doing this after 10-15 minutes i gurantee you you will get 100% new idea what to write about any topic.

If still i am not getting any ideas to write collect books and read them as well your knowledge will be increased and you will also good answers to question and get some new topics to write