Add flannel lining to crocheted blankets. I've never liked how airy crocheted blankets are - they let the cold air through (what's the point) and little fingers can get stuck. This is an option, though I would choose a different stitch pattern.
Fabric lined crochet blanket. This is a really good idea for a couple of the blankets my kiddos received as baby gifts that are falling apart. I can then stitch the parts that are unraveling to the fabric.
Skip the store and make your own slouchy sweater. This lacy oversized cardigan has batwing sleeves, ribbed cuffs, and a generous shawl collar that is perfect for Fall layering. Create a Craftsy account and get 50% OFF the pattern and supplies!