(hover or tap images to reveal)
Look at the section headings of an article, chapter, or web site. Notice how it's organized. This will help you understand the content.
Make sure you understand the language level of the source. An article using language that is too technical may not help you, even if it is about your topic.
Write down the ideas, facts, and statistics that are important to your topic or argument. Keep track of page numbers or sections where you find information.
Write down as much citation information as possible. Noting the author's name, the title, the date, the exact web address will save time & trouble later.