I can liken much of my experience living in NYC to being on a Walkabout, though I didn't realize this before Lost introduced the John Locke storyline, I'll admit. Life imitates art, no? My life has essentially become an Urban Walkabout, learning to survive on my own in the city. Long, solitary walks have become the meat and potatoes (seitan and fennel?) of my sanity.
Lesson #24: Start getting used to doing things alone, and learn to enjoy it if you already don't! This may sound extreme to those without an inclination towards introversion, but that's the beauty of this city - even when you're alone, you're surrounded by millions. Basically, you're never alone in New York.
I think a lot of people are afraid to spend long amounts of time with only their thoughts (and perhaps some good music). Some of my most brilliant thoughts come from random walks where I have no social constructions to worry about and am able to simply observe life being lived.
Plus, what better way to explore the city than setting out on long walks, with maybe this guide, and planning a day to really get to know one neighborhood? Some of my favorite days I've spent in the city were ones when I woke up and decided to go to a random spot on a whim, discovering things I'd never have found otherwise.
Of course many things are more enjoyable with good company, which I'm very lucky to have here. Now that I'm living alone (what perfection!), I appreciate my time with others that much more - yet I understand how closely my sanity is tied to having time alone.