mattd, rephrasing whatsnoopy said:
Anything you enjoy that will also broaden your CV as a team player. Also look for the opportunities to be a leader rather than a simple follower. Whatever happens, in the service or not, the more you can do to broaden your CV and raise your profile.
My daughter got several job interviews on the basis that she had been the 'womens' officer.' Although several interviews implies she was unsuccessful she had the interviews as a temp and got almost every job on the table. She now works for a publishing house in HR.