If you’ve got lots of leftover yarn you don’t like, the best option is to use it to practice new techniques or give it to charity. This is especially true if you’ve got different types of leftover yarn that don’t match, or you simply don’t have enough of it to make something worthwhile. If that’s the case, you can put it to good use by knitting swatches or testing out new stitches that you’re less familiar with. If you make a mistake, you can simply discard it — you don’t like the yarn anyway!