Can Anyone Relate?

Am I the only one that has started writing a book, multiple ones, and stopped writing and have left them, unfinished. I have many times, I get started and stop. I need self discipline for sure! Just look at my track record of my blog! How do you keep up writing your book? Any ideas for motivation? Or is it literally making yourself sit there daily and writing something for an hour or two. I would really love to get some books out of my head and onto paper. Perhaps another goal I need to accomplish this year. So much to do! I can do this!