Cheat sheets are reference materials that contain important or frequently used information for exams, homework, or tasks. They can be used to review key facts, dates, formulas and help memorize required information. When creating cheat sheets, it is important to have a good layout that is not cluttered and easy to understand, so the needed information can be found very fast. Different types of cheat sheets exist for various subjects like math, science, business, and formatting styles. Online services can help provide examples and assistance in making effective cheat sheets.