3. When/If the torso seems secure, gradually pack more snow onto it, covering an even smaller area. This will be the head. If the torso fell off a dozen times, the head will fall off at least 32 times. Snowman building is a lesson in persistence.
In case you're interested, the actual snowman I built the day I wrote this post looked like this.
Then we got some more snow, which proceeded to start melting, transforming him into Jabba the Snowman.