This is what I do:
After I get an idea, I think of a good way to start, then I write that. I come up with some more of the story and write that and repeat it until I come to the end of the idea or to the limit of the ficlet, and then if I think there is more that needs to be written, I will sequel it. After I’m done writing, I will fill in the title if I haven’t already done it and give the tags, which include the title.