I wasn't quite sure how to title let alone write this post or if it is even the best place for it so here it goes.
My writing style fluctuates between some planning and stream of conscious writing what pops into my head. This has led me to not finish a number of works due to my expanding the story beyond what I originally had planned for it for example I had planned for my HP story to be around 100K not the monster it has turned into. (It is several times that by now and only a little over 50% complete, I do not plan on stopping it). My question then is how do you write your stories and keep them focused and not turning them into ever expanding works.