Online Advent Calendars- Pass this one on to your youth and use it yourself. This online advent calendar would be easy to adapt to hardcopy and given to your students. And this 2007 calendar has it all! More ideas than you can shake a stick at!
Advent Retreats - Here is not just one but two complete outlines for Advent spiritual/scriptural retreats which can be done personally or in a group and can be explored as a one-day retreat or over several days during the season. Find related resources here.
Start a New Tradition - Get a new Advent tradition started with your group that they can look forward to for years to come. Some good ideas here.