You will get most out of your lectures if you prepare beforehand, listen actively and participate during the lecture, and review your notes soon afterwards. You will need to take well structured notes so try to identify the form of note taking that suits you best, early in your academic studies.
[click image for larger view]
Lectures mind map.
You will find more detailed guides on preparing for lectures and note-taking in the resources listed on this page.
Lecturer image by Max Griboedov/Shutterstock (image ID:401859706). Image edited by Southampton University Library.
6 Habits for Highly Effective Students
Making the Most of Lectures and Seminars
Making the most of lectures by Bangor University.
Lecture Preparation by University of Staffordshire [PDF].