The most important thing to remember about highlighters is that they are meant to be used sparingly. Highlighters should be used to draw attention to the most important elements of a text, such as key points, definitions, and main ideas. When highlighting, it is important to use different colors for different types of information. For example, one color could be used for main ideas and another for definitions or supporting details. Additionally, it is best to avoid highlighting entire sentences or paragraphs. Instead, focus on specific words or phrases that are essential to understanding the text.