1) Don’t wait until you know who you are to get started. The way you figure yourself out is by making things.
2) Write the book you want to read. Don’t screw around writing work to please your teachers or agents or literary journals. Think about the books you love, and mash them up into something of your own. Think about the writers you love, and pick up the torch from them.
3) Do good work and put it where people can see it. That’s the only real secret. The internet is the major medium of our time, so don’t ignore it, embrace it.
4) Be boring. It’s the only way to get work done. Get a day job, find a regular hour or two a day to write, take care of yourself, and be a good friend.