This is a good learning tool. Join study groups. This system of interactive learning works well for some. Identify weak areas. Concentrate on areas of deficiency, seek help on study materials, and plan your method of review.
Many excellent texts are available.
Besides reference sources, they may be helpful in the organization of information. Information filing systems are a necessity for us all and are highly individualized. Papers and journal articles can be filed by subject matter or filed numerically with reference to another number file box. The method simply depends on whether one wants to save time during the filing or retrieving of the information. Black book, flash cards, etc.