I learned, over time, not to be a finisher. I would start grand projects, read the first 20 pages of a hundred books and write the beginnings of a hundred blog posts (much like this one). All of them are fragments -- I have a folder on my computer called "fragments" -- and none of them is finished.
It took me a long time to learn this, using the power of habits to make myself a master at the heavenly craft of completing nothing. I wasn't always great at it, but through the sheer application of walking away from things I start, I have come to the point where I can consider not finishing what I started as my profession, my true calling.
And now, I am ready to take the next step and make this my full-time job!
Failing to finish things gives you an amazing feeling of accomplishment. The words you would have written but never got around to are the most perfect ones you can imagine. The exceptional middle and ending of the work, which you just couldn't put to paper or screen, will always beat anything you ever actually wrote.
I would recommend failing to finish things to anyone. You will never have a greater sense of achievement. Go forth, young person, and stop when you feel like it.