You ask a very good question and I think that Emma makes a good point. Students need to know prior to lab what lab expectations are. Many teachers start the year with lab safety so that they can teach students the location of the lab safety equipment in the room and what safety guidelines they should follow with every laboratory. General lab safety guidelines might include:
1) Always wear eye safety.
2) Always know the location of the safety equipment.
3) Always keep your area neat.
4) Always be careful with open flames.
5) Always leave your lab area and dishes cleaner than you found it.
In addition to goggles, it might be important to have students wear a lab coat or apron. I would say students have an attitude change when they are wearing personal protective equipment. They tend to take the laboratory more seriously. It is important to highlight any additional safety concerns that students should follow with each activity.