How to be a finisher

I have been thinking a lot lately about finishing. Not necessarily life, but more of the everyday projects. I just built a 8 x 12 utility building in our back yard. I haven't quite finished the trim on it yet but it looks awesome (I should have posted a pic, that would have been cool, sorry) But for the last 2 weeks I have been trying to build shelves and clean up and move everything over. It just hasn't happened. I really enjoy building stuff, it takes my mind out of all of the day to day stuff. It's is definitely a stress reliever for me. So here is the question of the day, "how do you become a finisher? Are there other places in my life that I have some loose ends...oh yeah,
anyway, that's what I am thinking.