Preparation is often the most difficult part of your search for information. Getting this right will greatly benefit you in the rest of the search process. That is why it is important to have a clear idea of exactly what you want to know before you start your search.
First you orient yourself on your subject. Then you formulate a clear main question and possibly a number of subquestions. To answer these, you formulate search questions. Only when these questions are clear can you come up with concrete search terms that will allow you to search faster, more efficiently and more effectively!