I am a practising barrister, but I teach part time on the LLM course at UCL.
Treat university as your job. Work 35 to 40 hours a week. Focus on reading cases ahead of commentaries and glosses. Aim to read maybe two thirds of the recommended reading for any assignment (more if you can, but academics don't usually expect students to read everything on the reading list). Make time for rest, exercise, and social life. Network a bit on LinkedIn, mainly towards the end of your course.