A Notebook// Write down everything! Passwords, simple instructions and complex instructions. Even write down who does what. Bring either a legal pad or notebook just for your internship!
A water bottle// You may or may not be doing a lot of talking, but a staying hydrated will help you stay focused. Bring one you can leave so that you don't forget to have one at the office!
Paperwork// If you have a paid internship, or you are taking one for credit make sure to ask if there is any paperwork you need to bring! This could include your social security card, passport or drivers license.
Positive Attitude// Remember this is your first day. Even if it isn't exactly what you wanted, make sure to still be positive about it. It's a great experience, and you should really try to make the most of it.
Listening Ear// The first day is probably going to be full of a lot of information, so make sure you are ready to listen. Try and remember names, important times and even what to do everyday when you arrive.
Snacks and/or a Lunch// Depending on what you might need, bring food if it is going to be a full day! You don't want to be concentrated on your stomach when you're in an important meeting or getting to know your new co-workers!
Where is your internship this summer? What do you always bring?