Buy the most expensive computer imaginable, with a monitor as wide as a bay window.
Fill your writing room with a really big desk ('cuz you need to fit that monitor somewhere). The bigger the desk, the more important and author-ish you will feel.
Get yourself a nice pen. I suggest one of the Writers Edition pens from Montblanc. My personal favorite is the Edgar Allan Poe. You won't need it for writing, but it looks good on a big desk next to a big monitor.
Refuse advice from friends, agents, editors, other writers or anyone else who has an opinion on how you should write. You and I both know what opinions are like anyway.
Expect immediate success. In fact, demand it in your query letter --of which there will be only one.
After you complete your first draft, your manuscript is done. Refuse to make changes. You are an artist. It's time you start acting like one.