The most common word I hear from interns and about interns is "awkward". Here are a few corporate internship do's, don'ts and "do you's" that you won't learn in training:
1. Do be polite to the support staff and assistants. They will make your life so much easier. Learn their names. Ask them about their weekends. Not only are they valuable members of the company too, but they've probably been there a long time and can give you additional information about the company. An internship is a long job interview. You should continue to assess whether the company is a good fit for you and the staff is a great resource.
2. Don't talk about anything sensitive or confidential on the elevator. Many companies share the building with other companies. There could also be a visitor or client on board heading to a meeting. Same rule applies to restaurants.
3. Don't check your cell phone during meetings or meals. If you have an emergency project you are working on and need to be on call, politely decline the invitation. You are an intern. If the full-time professionals can carve out an hour for a meeting, so can you. In their minds, you are not that busy. It doesn't matter if you see them check their phones every 10 seconds. Resist.