As tempting as it seems to wear tennis shoes with your tux, don't do it. I think it looks ridiculous. If you're 14 years old, maybe give it a shot. In general, don't portray anything that says 'I'm too cool and I don't care.'
The military is a very cool world to write about. I went down to Ft. Benning, Ga., for military training, and I learned a lot about soldiers and officers and why they joined up and what their life has been like.

