First thing is first, do your research. If possible visit the city before you make the big move so you know what you're getting into. What might seem great in theory can often be very in practice.
Step2
If you can't visit then talk to the people you know what have lived there to see what sort of insight they can offer you.
Step3
Have a job. It's definitely one of the best pieces of advice I can offer for moving to such a large city as New York. If not a job then a place on a course to study. Having something to do with your days helps you threefold, it gives you a purpose to your day to day life, it allows you to arrive without then having the added burden of having to compete with the millions of people already here and it helps you to meet people and have daily interaction with people as New York is known to be a lonely city
Step4
Work out which area you want to live in and then get online to look. Craigslist is the most common place for people to post a vacancy in their home. This means there is a wealth of places to choose from, it also means that there are lots and lots of unsuitable places on the market. Try to limit your choices to what is within your price range, and which is the are you'd like to live. As a tip, try to avoid any postings that mention a 'space' rather than a room as sometimes these are a curtained off section of a loft and offer little privacy. Unless of course this is your preferred choice of living arrangement.
Step5
Get involved. IT is notoriously hard to meet people in NYC, but not as hard as you might think. While people do tend to be closed off, the best way to meet new people is to meet them in a casual environment, doing something like joining a book club, joining a gym, get involved in your local neighbourhood. There are so many ways to work together and meet like minded people in the city. And of course keeping a positive attitude and being smiley will make you seem more approachable and a head start when meeting new people
Step6
Don't give up. It may take a while to feel settled and New York can be lonely but it's also a great and rewarding city. When you're feeling down you do so things for yourself, like call the people back home, go for a walk in central park, volunteer at a homeless shelter or go online and find other people in the same boat as you.
Step7
New York attracts so many people that there are always new people moving into town and these people are always great to meet and explore the city with.
Tips & Warnings
Keep a positive mind
Take in the wonder of your surroundings
Throw yourself into community events
When looking for a new place to visit, be careful. Don't view properties without letting someone know where it is and when you should be expected back.
Don't be too friendly with people until you feel safe in their presence
Don't give up, New York is a hard city to live in but it's worth it