In my experience working with in a tech startup with 8 people, what has worked for us is:
1) Determine the skills, strengths, and weaknesses of each person
2) Determine which responsibilities each individual member cares about the most and be passionate about
3) Delegate responsibilities based off of everyone’s interests
You could just be a tyrant and just tell one person to run the Facebook page, another person to run the Twitter Page, someone else run the WordPress, but if that’s not something that they’re interested in / passionate about then the quality of work and progress of your student org won’t be optimal