Write articles about topics you or your collaborators care about. Do they tackle humanitarian issues? Are they related to current events? Do they offer advice or interview interesting people?
Write short stories to give your magazine a more personal touch. These can be fiction or nonfiction depending on how they relate to your topic.
Dig up old poems, or ask friends if you can publish their work in your magazine. These would give a magazine an artistic flair.
Collaborating with friends to get different perspectives would be a great way to approach this aspect of the magazine.