I count blocks as an unfinished project, but I count tops as completed, "just not quite a quilt yet". I have a small house and space is always a consideration. I bought large clear plastic totes that I can see through to guilt me every time I step into the room, but which are out of the sunlight. I put my top, back, and binding in the box along with any notes/patterns for the quilting.
I have to look into ways to get more of my tops quilted but it is the piecing that I enjoy and since most of my projects are for donations at this point, I'm not hugely motivated to spend money to finish them. I need to get my Bernina to the shop (can do up to twin on that), and I need to look at finding a home set-up that someone would be willing to rent to me for a couple days per month. Can't afford shop rates and am looking for something a little less time structured.