Set a specific time frame for how long you will search.
Don’t forget to include the citations as you write, so as not to lose track of who said what.
That balance will depend on how much you already know.
For people writing literature reviews for articles or books, this system also could work, especially when you are writing in a field with which you are already familiar.
Step One: Decide on your areas of research: Before you begin to search for articles or books, decide beforehand what areas you are going to research.
Make sure that you only get articles and books in those areas, even if you come across fascinating books in other areas.