What advice would you give a CS student starting their freshman year?

The school year is starting, and freshmen everywhere are taking CS101 (or some equivalent) in their respective universities!

It's an exciting time, but it's also the beginning of a 4-year struggle for some. Like 17 y/o Wellesley freshman me, who dropped out after DS&A, later referred to as a "weed-out" course. :(

What advice would you give to a freshman CS student on their first day of classes?