The FBI and DHS released a new “pocket” bomb threat guidance document available here. It provides a two-page overview to help you deal with bomb threats: planning and preparation, your “emergency toolkit”, what you should do if you receive a threat, how to assess the threat and the possible responses.
Now is a good time to review, or to think through your own plans. Our own Emergency Planning: Disaster and Crisis Response Systems for Jewish Organizations has a longer chapter discussing the issue. Learn how to handle a phone threat with this checklist.
Finally, read an FBI account of an October 15, 2012 bomb threat (with an actual pipe bomb) to the Home Depot store in Huntington, NY. Their bomb threat plan was put to good use.