It became obvious to me that I needed to have an overlook over my completion-rate. Heck, might as well have an overlook over the games I own and have played. For this, I have decided to finally register and use Backloggery.
My completion-rate is not as bad as I thought it was. There's some work, but now I know a bit more where to put a little bit more focus. I completed Kingdom Hearts: Birth by Sleep yesterday as a result of this.
You can check out my backloggery here.