The problem with highlighters is that you usually can't undo the marks without ruining the paper. Enter the washi tape — a type of translucent masking tape that comes in different colors and pretty patterns. Using pretty tape to showcase your different projects will make your calendar more visually appealing and easier to analyze. If there is an urgent project, you can always mark it with pink or red washi tape and mark more casual events in lighter tones. That way, you'll be able to prioritize with ease.
Source: Take Two They're Small