Do you leave experiments running after-hours or over the weekend? Are you ready in case an incident might occur? Establishing clear procedures for late or unattended work may help prevent a minor incident from becoming a serious one. See this article by Richard Paluzzi, a noted lab safety expert, for more detail.
The Laboratory Safety Advocates Office has developed an unattended experiment form that you should fill and post on the laboratory door and next to the experiment. If you have questions about filling out this form contact your PI, laboratory manager or the Laboratory Safety Advocates Office.