Do all the work you are given, even the bits that feel pointless
Both a university and a funder advising first-years say to do all the set work. Tutorials, small exercises and readings that look like busywork are often how the lecturer checks that you understand, and they are usually what test questions are built on.
Source: https://www.up.ac.za/news/help-im-first-year-tips-making-most-of-your-time-student · https://tisofoundation.co.za/?p=4680