I sew some of the batting pieces together and use them in other quilts. I’ve been experimenting with painting the smaller batting pieces to use as elements in art quilts.
as far as practice pieces or sample blocks, I usually pit a quickie binding on them and use them as trivets. Some of my practice quilting pieces get saved to use as reference materials- they really come in handy when I’m having trouble deciding how I want to quilt a piece-
as far as the fabric from squaring a quilt goes, depending on how much and what size, I will either put it in my scrap bins for use in other projects, or it may get used in a string quikt, or if itks just some really thin strips I put them in my shoebox of strips to be used in making clothesline trivets and bowls.
orphan blocks get put in the UFO pile- sometimes they get used in sampler quilts or in art quilts, or if thry’re large enough they get turned into pot holders or table toppers.
Rob