A Compare and Contrast Venn diagram is an excellent tool for brainstorming and comparing two or more objects, events, or people. This Compare and Contrast Venn Diagram can be used as a starting point for creating an outline for a compare and contrast essay. Draw two (or three) large circles and label each with a title corresponding to the object, trait, or person you are comparing. Write all of the characteristics that the things share inside the intersection of the two circles (overlapping area). When comparing similar features, you will refer to these traits.