The only thing that matters is that you write, write. write. It doesn't have to be good writing. As a matter of fact, almost all first drafts are pretty bad.
~ Walter Mosley, This Year You Write Your Novel
Just write. Just get words onto the page.
It doesn't matter what you write or how you begin. All that matters is that you do begin. All that matters is that you write one word and then another. And then another.
However you begin, your first words will take you where you need to go, as long as you answer the call of your Muse, as long as you listen to your story, as long as you free your words onto the page and go wherever they carry you.
There's a time to revise, rework and reword. That time is later. Now is the time to write, to begin.
Have you begun? Are you writing your story, your poem, your book?
If not, close your browser and open your word processor. Or get pen and paper. However you prefer to write, write. Just one word. Any word. Then another. And another.
It's time to begin. Now. All it takes is the one word that gets you started.
Photo credit: David Shankbone