Wash your hands frequently.
Say "Behind you" in a clear voice when behind or approaching behind someone.
Work clean and neat. Don't expect anyone else to clean up your mess.
Don't hesitate to use the broom if need be.
Keep your opinions to yourself.
When finished with a task, ask for another.
Say Please, Thank you and Excuse me frequently. Be cheerful, no matter how miserable you feel.
Take direction well. If told you aren't doing it correctly, change the way you are doing it.
Be careful but not a sissy. You are working in a hot environment with sharp objects, open flames and hot surfaces. Be aware of that at all times. Work with confident awareness that you are in such an environment.
As a line cook, learn your station. get your ingredients and tools ready for service in time for service. Make yourself a prep list so you are not caught short when service begins.
Don't be emotional when you screw something up. Accept it, listen to the criticism, learn from your mistake and keep going.