I have designated one shelf unit just for future projects. As I find fabrics I think I might use for one of the projects I add it to the pile. I finally had to start putting notes on the piles to remind myself which one goes to which project, especially the bolts of fabrics. Now my project unit is completely full and over flowing but told myself I couldn't start new project until I had what I've already started finished or at least to the point of quilting. I have one quilt on the frame, 4 projects on the design wall waiting to be quilted, 2 lap size quilts hanging up waiting to be quilted but need to design the quilting layout for them and have another project waiting on the side lines while I look for the perfect fabrics for it.
Attaching notes sure helped me to these projects as it may be a year or more before I get to them.