Good notes should have a clear organizational pattern. When you take notes,you should write them down with your own words, and the ideas in your notes should to one another. that is to say, your notes should be arranged into an appropriate form e.g.a list, a diagram, a table, etc.
Good notes need the source where the information comes from. You need to the name of the the date of the , the title of the book or journal, the name of the, the in case of an article, and the page number(s), etc. exactly as they are written. If you want to comment on what you are reading, keep your ideas separate from those in the text. You may draw a box around them. When you finish, what you have written.