Invest in a pair of thick framed glasses — regardless of whether you need them or not. Lenses are only optional. Think Woody Allen. Or Gandhi, if you're feeling adventurous.
Swap your smartphone for a more basic Nokia — something with a lowest resolution camera, or even better, one with no camera at all. Technology confuses you. You don't understand it, and what's more, you have no desire to.
Correspond with people via post rather than Facebook. How else will your letters get posthumously published and preserved for all posterity? Imagine what would have been lost if John Keats and Fanny Brawne had used Skype or WhatsApp!
Invest in a fountain pen and black Moleskine notebook — these are the only items befitting your creative and interesting thoughts.
Find yourself a regular haunt. It could be one of those absolutely-not-part-of-a-chain coffee shops. You know, the kind that writes its menu on a blackboard, has mismatched furniture and dusty books scattered around. Sit here regularly, reading and writing in your Moleskine.
Casually make whatever highbrow piece of literature you're reading visible to whoever you're with. This both lets them know where you stand intellectually as well as provide a potential point of conversation.