If your sewing typically draws blood, try Dritz Stitch Witchery, an iron-on adhesive. Use it to alter lengths or fix fallen hems on pants, skirts, and dresses. It's durable and easy to use, and it survives the washing machine. It won't look as sharp as a professional hem job, but it does work in a bind. $2.50-$3, www.joann.com.