Why is it important?
A lot of the ideas you come across at university will be complex, with no clear right or wrong outcomes. They are subject to debate and discussion, and this takes place in reports, books, textbooks and journal articles. They might also be presented in lectures or via online videos. By learning to take in information actively, you will be able to access this expertise.
How do I do it?
Read or listen with questions in mind, which will help you engage with the ideas presented, and then you can think about your response to them. Some things you read will be harder than others, but good background reading will help provide some useful context. Be focused and selective in your choice of material. To find out what is relevant, read as widely as you are able in the early stages of your research.