1. Be open to adapt to new environment, to meet different people and to accept new opportunities
2. Be proactive. It is better to ask for work and ask to learn rather than waiting for others to tell us what to do.
3. Be responsible to our work and own our mistakes. You might want to do more than just complete the work, and always try to learn the most out of every work you do. It is helpful to ask and understand why the task is assigned and why the work needs to be done in a certain way. Put your best effort into every task. It might be helpful to think in the way that if we were the senior, what kind of work deliverable we would expect to receive.
4. Do not afraid to ask any questions or feedback. It is better to ask for clarification rather than assuming. It is also better to compile a list of questions and ask them at the same time, but if a question is preventing you from making any progress, you should ask it right away. Moreover, finding answers yourself before asking them directly to your seniors is important. You can always confirm your answers or validate your thoughts with them, which can save time and demonstrate you self-learning ability.
5. Be responsive and punctual.
6. Be yourself and remember to smile
From my experience, getting offered an internship is the hard part. If you are offered an internship, you are doing something right,-- and they know this and will want to keep you assuming your performance remains. My advice to receive a full-time offer is to work hard in school. Keep your grades as high as you can. DEFINITELY, ABSOLUTELY, 100 PERCENT apply for the "Emerging Leaders Program" (generally offered the summer before your last two years of education). This will give you a leg up in be selected for an internship. Ask the accounting faculty more about how to apply. There are interviews and GPA requirements to be selected. It never hurts to continually practice your mock interviews.