Don't forget to include the adviser. Feed your Staff. Food makes for happy students. If it's getting late, order pizza and take a break. Pizza breaks allow for socializing and create space for staffers to laugh, joke, problem-solve and restore their energy for the tasks at hand.
Smart editors reward staff members when deadlines are met.
A small token of appreciation does wonders at lifting the spirits. The point is to let the staffer know you value his or her contributions to the team. Doing so inspires staffers to continue to deliver excellent work. Celebrate outside the Classroom. Take a little extra-curricular time to celebrate your successes.