There are a few things you can do:
Finding a note-taking system that works for you is one. Mind-mapping, the Cornell System and bullet points all have their benefits and draw backs and you may find that a mix of them or something completely different works for you. After taking your notes, actually review them. You may want to rewrite them in a more easily digestible format, or turn them into something resembling an essay or use them to make flashcards. By the way, most studies show that writing by hand is more effective than typing, so bring a notebook and something to write with to class.
Practice problems can help you get used to using formulas or using a foreign language. Be sure to check your work and reverse engineer the process.
Studying a little bit each day is better than cramming. Aim for 30 minutes per subject maybe 5 days a week.
Have a multiple study spaces that you can turn to. You may find some environments are more conducive to a particular subject or task.
Study groups and study buddies are great, if you can keep on task.
Keep things you need nearby.
Computers and smartphones are great, but can sap productivity - use with caution.
David R.
08/22/19