Good planning is the key to a successful information retrieval.
By making some quick basic searches at the first stage of the information retrieval, you can get a basic overview if the subject has been studied earlier and what kind of information is available about it.
A mind map is also helpful in perceiving the subject.
Remember also to define boundaries for the subject at hand, so that the information retrieval does not end up being too large to handle and analyze properly!
Example of a mind map with the subject of Finnish summer.
Before you begin searching, take a moment to think what are the central concepts of your subject?
Where can you find search words?
For optimal results, remember to try multiple different search words in different combinations!
In this example someone has found a book from Centria-Finna which is relevant for one's subject. In the details of the book one can find a list of subjects, and some or all of them might be relevant search words to be used in other searches!