<p>I am less concerned with the ability to study than the ability to learn. Therefore I suggest approaching the problem backwards, at least for the sciences and math. </p>
<p>In a class where the teacher covers the textbook material in class, rather than using new methods to attack the material, <em>skim</em> the textbook before class so that you will be able to follow the class. (By skimming, I mean: read through once for new vocabulary. Don't memorize.)</p>
<p>As for note-taking, as a teacher I try to encourage what I call "active listening". Many students passively take notes without thinking much about what the teacher's saying. Students should write down keywords, vocabulary, the questions s/he asks during the class. </p>
<p>After class, look at the vocabulary list: do you know all the words? Find them in the text and write down the definitions.</p>
<p>Go through the chapter and read the captions on all the pictures. What points are the pictures trying to make?</p>
<p>Look at the problems at the end of the chapter. Read through them until you find the ones you can't answer, then try to answer them by searching the text for that information. For the ones you can't answer, work through the process with a friend or go to the teacher for extra help.</p>
<p>Many texts include factual and conceptual problems. Make sure you can answer all of the conceptual problems. (If you have a teacher who emphasizes memorization, answer the factual ones too.)</p>
<p>For test preparation, I think making a cheat sheet works very well. By attempting to distill the information onto a small piece of paper (I recommend a 4x6 index card), a student finds the most crucial pieces of information and overlearns them. (When teaching full-time, I allowed the students to create such a cheat sheet; most said they never referred to it during the test, because they'd learned the material, but they also found it reassuring to have.)</p>
<p>Many students benefit from making a concept map in which they distill the main concepts and how they are connected to each other. This web page illustrates and explains concept maps: <a href="http://users.edte.utwente.nl/lanzing/cm_home.htm%5B/url%5D">http://users.edte.utwente.nl/lanzing/cm_home.htm</a></p>
<p>Finally, if you really want to learn the material, encourage your teacher to give open-book tests. Open-book tests assure that memorization is irrelevant, while learning and synthesizing is essential. Of course, they're much harder to create and grade.</p>