Study Scripture pertaining to missions and lay a foundation of prayer. Have members begin to form friendships with internationals. Invite international friends for a small group social, and use the social to announce an investigative Bible study. Involve the small group in service to internationals - volunteer with the international student office, or start a language partner program if there isn't one on your campus.
Service can happen on a small or large scale.
Involve internationals in leadership and service as early as possible.