If you get to parts that you don't understand or that don't make sense to you, mark them and then make a date with a friend in the class or the professor to clarify what you missed. Some people recall information better when visually represented. Learn them three at a time, slowly adding more. First develop the ability to match the definition with the term. Then study so that you can recall the term when you see the definition, and then visa versa.
Some students swear by writing things out.
However, I suggest that you make sure you paraphrase when you write and don't memorize verbatim. You'll recall more if you really understand something. Rote memorization, in some cases, can be the kiss of death. Reading Take an active approach to reading. Some students read the text into a tape recorder and then listen to it.