I like to make kits on the days when I have time and don't feel like quilting. I go through my fat qtrs and cut tumblers, 10 inch or 5 inch sq. , circles etc...I love opening my closet and pulling out a bag of precut fabrics that are already sorted and ready to sew. We I precut I do have a quilt in mind and only put the pieces in that I am going to use for that quilt. I also just signed up for a class to do a bag. It used 48 charms. So I just cut all of my 5 inch pieces and also added the yard and half from my stash out in in abag and its all ready...though the class is next month. Precutting helps with storage. I never precut anything that is 2 yards or larger since I use those for bindings and borders. I never precut my strips.