You've received some good suggestions to help with studying, including staying organized in your work space, taking notes (and for them to be more concise), and perhaps joining a study group (though, preferably meeting in a public place, such as the local public library, school library, or local book store).
When I was at community college, I would make "flash cards" out of "lined" index cards. That can be especially helpful with learning new terms and vocabulary, for instance. Just an fyi that the larger index cards (4x6 or 5x7) tends to be easier on the hand and eyes. Perhaps you may also consider making a mock-up test in the same format of your teacher, such as fill-in-the-blank, multiple choice, true/false, and/or short essay.