Good lab practices
Safety comes first. Make sure you follow the safety requirements of the lab and that you are wearing the appropriate personal protective equipment. When working in a new lab, look around and identify the safety equipment so you can react quickly in case of an emergency.
Keep track of all the steps that you are performing and write down the chemicals you were using.
Make sure you label all your samples with the content, potential hazards, the date and your initials.
After you're done with an experiment, clean all used glassware, return reagents to the correct storage area, dispose of waste in the appropriate containers and clean the workbench with ethanol.