things are 1) As most of the work is group work, work hard and lead discussions in & out of the classroom. 2) Cultivate relationships with the rest of the class (this goes hand-in-hand with 1). The people in your class could/should be a primary network for the rest of your career. Make sure you are worthy of their trust. 3) Though this is more difficult to accomplish as an experienced professional, do your best to ensure that you have a transformational experience, like your undergrad or mission. Be open-minded and be willing to change preconceived notions.

Good luck & have fun.