I keep newspaper clippings from the amherst bee of the girls swim team, when I am or a friend is mentioned and I hang them on my wall along with the ribbons I win from my races.
Something that I always have in school is a water bottle, without a water bottle I constantly feel thirsty and I like to stay hydrated at all times. I also use it for practice right after school.
I always have my phone with me for many reasons, I will use it for school purposes, or too listen to music when I am not in a good mood, and to keep in touch with friends and family. My phone isn't a necessity, but is very helpful throughout my school day.