Advice
This is pretty cliche, but I would say to really work hard during you couple months of an internship. Get to know the people on your team and also branch out to others not on your team. Ask questions, but try your best to figure out the solution to your problem first which shows that you can be independent. Finally, I think for most internships, you are going to use excel to an extent that you don't necessarily expect so try to familiarize yourself with excel before your first day.