A few other thoughts for you! I love internships and did nearly a dozen of them starting as early as high school - mostly as an opportunity to learn about other fields of work and roles, so definitely think about the opportunity of an internship in it's broadest sense (how the following work: people, topics, place in industry, roles, pay, promotion)
- First understand how the company you're at views the internship program. Some companies consider internship programs as a way to get cheap labor for certain work. Others see it as a path to bringing in full time employees into very structured and highly accelerated career paths.
- Once you understand how the company views the internship program, think about your goal. Regardless of the actions that the company takes, what do you want out of it? Are you in marketing, but want to know how someone in accounting's day to day looks like? Do you want a good recommendation letter out of it?
- Keep in mind that sometimes, a company might have loved working with you, but because of external factors (e.g. let's say the company isn't doing well anymore), they can't offer you a job. Remember that if you do a great job they could consider you for a job at some other point in the future. This is not your only chance. Think about it as a relationship! These mentors/bosses might always be in your career life, and you might work with them again (in this job or another job).