Here is a step-by-step “Worm Infection Cheat Sheet” that was published by the CERT Societe Generale in France. It’s divided into three sections that break down tasks into preparation, identification and containment stages and make it easy for you to see at a glance what needs to be done in each phase of the incident response process. It’s downloadable in PDF format here:
http://cert.societegenerale.com/resources/files/IRM-1-Worm-Infection.pdf