Video: Lace Cast-On
The Lace Cast-On is a decorative short-tail cast-on that looks good with garter stitch, seed stitch, and ribbing.
Wrapping the yarn around your left-hand needle before doing a knitted cast-on stitch creates an extra loop of yarn on the edge of your project.
Be warned that if you use this edge on stockinette stitch, it will tend to curl - that's why I've shown it to you here in seed stitch. You could also use ribbing or garter stitch.