Certainly not steaming your clothes before you arrive the office. Subway commutes and walks usually wrinkle your clothes a wee bit before you even get to the office anyway.
But rules for success:
Never be standing around doing nothing. There is ALWAYS something to do.
Everyone texts/BBMS/Pings. Its fashion, PEOPLE. What are my thoughts on this? Texting is super fashiony. If you are doing something important, do it while you are eating or on a wee break.
Arrive early and stay later than others - typical intern guidelines.
Be friendly, kind, and super hardworking... even if it takes a bit of time and other people are not this way. If you are afraid to do something (which I definitely have been) remember that everyone else also had a first time for everything like you!
Be thankful for an awesome opportunity you have been blessed with!