Writers Digest has several sources filled with ideas for developing creative writing prompts. One of the most popular techniques is to use real-life experiences and events as a starting point for writing. Another technique is to use pre-written scenarios that give basic details to start and progress the story.
There are several free online resources available for creative writing prompts. Creative-writing-now.com is also a useful resource that can help with writing prompts for all types of fiction styles.The information includes prompts for character development, plots and settings as well as phrases to help develop ideas at any stage of writing.