Learning is something that should simply be enjoyable and part of your every day life, alongside your studies.
Developing a regular habit of learning more generally will also only help you to develop good learning habits for your studies too. Here are some suggestions of how to 'learn' as part of your every day:
Listen to the radio or a podcast whilst doing something else
Talk to a friend about your studies, or topical issues while you walk.
Watch documentaries and discuss them with friends and family afterwards