It's all about wearing this R2-D2 Backpack ($65) with a completely straight face as you make your way to your destination. I would personally pair it with a grown-up trench coat just to make passersbys' heads explode just a little more. Oh to be queen of irony!
I don't care how old you are, a Star Wars fan is a Star Wars fan and I can't hate the idea of this backpack, but would I wear it? Not sure.