If i won I would call my parents and family and drop them a line. I'm missing out on visiting them this christmas (only get to see them once a year) so it'd be nice to be able to call them more frequently.
I would call a friend I met a few years ago who lives in Italy. We met for business in new York and I never got to talk to them and thank them. And I would call everyone I know to let them know I have a galaxy nexus..