I have to keep track or else I'll drive myself crazy. I quilt with friends one wekend a month so I just keep those projects in my trunk (One BOM and another queen size) That way I don't forget bits and pieces when I'm packing.
At home I have one that I'm hand quilting, one that is cut out, one that I have fabric for, one that I'm collecting fabric for, and a zillion patterns that I want to make yet before I die.
I also have 2 tops that I don't like well enough to put the work into finishing.