Consider keeping a philosophical journal. This is not a diary about daily events or a notebook for reading and class notes. It's a laboratory where your own thoughts can grow. It will help your note-taking in many ways. First, it will give you an outlet for thoughts that might not belong among your reading notes. Second, it will give you practice in articulation and analysis that will pay off in your note-taking and all your other writing. Third, it will raise your consciousness about issues that you might well encounter in your reading.