If you can't come up with any cross the item off your list.
Study publications of the school to which you're applying and make note of what qualities they value in their students.
For example, Stone Ridge emphasizes leadership and social action, while Good Counsel accentuates the values of the Xaverian Brothers.
Brainstorm reasons why these factors are important to you.
Come up with at least three reasons for each factor; if you can't, cross it off.