pfft i dont finish much either on stories and i end up pissing off alot of people >.> had one on DA i didnt know anyone even fallowed till about 3 months later after not touching it, i got yelled at to finish it haha!
I could if i wanted to but alot of the story that was filler was made up as i went.

Think of a few main points that you want in a story including the ending. This way the middle can be just alot of what you make up, kinda as you type along. This was its fun for you and alot more for the reader to well...read
I did this alot in that story i mentioned. I did not intend to add characters in the middle nore that the mane character was the culprit but i ended up changing my mind x3 thinking it would be a neet twist. Too bad no body knows but me now haha....eeh....i should go finish it....one day *snoozes*

Also dont focus so much on what some one might think of the story and dont self criticize as you type. Type it all just DUMP it onto the paper/computer once done proof read and fix errors THEN critisice reorganize. This way its now DONE at lease... now its just being edited
*shrugs* hoped this help and thanks for the watch