What advice would you have for a student just entering college interested in working in development for tech startups? What should they prioritize out of just a

What advice would you have for a student just entering college interested in working in development for tech startups? What should they prioritize out of just academics? It's often said that it's more about the team then the idea. From your experience with YCombinator, what are the signs of an effective team member. Moreover, what can you do to prepare yourself to be an effective member of a startup team?