It’s helpful if you can see a folder—on any platform, on any device—and instantly know which of the four main PARA categories it is in.
I like to use an informal naming convention to make this possible, such as:
For example, these are immediately recognizable as projects (because they start with emojis):
Create sponsorship package
Write article on new environmental standards
Plan Mexico City vacationThese are clearly areas (because they are capitalized):
And these are resources (because they are uncapitalized):
These naming conventions also have the benefit of working across any platform, since they require only the most basic text characters.