Make sure you turn up on time, are suitably dressed and are raring to go
Greet everyone you meet with a smile. Don't be afraid to ask people about their roles, they'll be flattered you asked.
Listen carefully to instructions and note down important meetings, dates and deadlines to help manage your time effectively.
The more you get stuck in, the more you will learn and take away from the experience. Be enthusiastic about every task.
Ask for clarification if youre note sure what you're doing, but be resourceful. Sometimes a quick Google search will help you find your answer.