I use mine for applique, paper piecing, strip piecing and the I've actually use the snippit (iddy bity) pieces to create falling leaves in a Autumn Quilt for my mom.
Then there are the trims off the edge of fabrics I'm squaring up and the debris from when I use my serger. I collect these to stuff in pillowcases that I fill up 2/3 of the way, sew it closed and donate it to our local animal shelter for the doggies & kitties to sleep on. It amazing what those leftovers can be used in.