That arty thing I don't finish

I like to be creative, I've been drawing since I can remember and trying my hand at any type of art I can think of, some great and some not so. I've made things and sold them, I've taken sewing classes and failed miserably at it, I love special effects makeup but its who you know in this industry not so much what you know. My biggest problem is finishing what I start. I drew a picture on a huge canvas about 4 years ago and to this day am still not finished. I looked at it about 6 months ago and said right, I'm going to complete that and still here it sits leaning against the wall. I think in the new year as we all make our New Years resolutions, I will be a finisher. It beats saying I'm going to lose weight on the 1st January, as if that ever happens haha.