I have a question on safety during an experiment. So far, I have appropriate dressing, safety goggles, gloves, gentle handling of chemicals, no eating and drinking, and proper equipment use. However, I do need at least one more. Could someone help me with this?

Know how to use safety shower.

Know how to use eye wash system.
Know where the nearest first aid kit is located.
No smoking.
Use fume hood when appropriate.