I have a list somewhere but you probably have that already--
The volunteer positions I've been in have allowed me to see many good ideas. Some of my favorites:
Singing--Take voice lessons in order to be able to sing a solo during pref ceremony second semester
Enhanced creativity--take a pottery class at the local art store to learn about throwing pots. Will auction off projects to raise money for ANAD.
Career Prep--Work with a mentor to develop an academic and personal action plan for preparing for a career in __________.
Political Advocacy--research candidates and provide personal information to chapter sisters on candidates, research both sides of hot button issues and prepare a one page info sheet on the issue monthly to hand out to sisters and classmates; and encourage fellow students to understand the issues and vote.
Understanding other cultures or religions--one weekend of every month, commit to visiting the church, synogue, temple etc. or some other community gathering for a people of a different culture or background than your own.
Along the hunting lines, I once read about a sister who took fly fishing lessons so she would have an activity to do with her dad and brother.