But not yet. But once you've designed for speed, consistent navigation, and made sure everyone can actually see your site, you need to take a few more minutes to think about your content. I've said it before, and I'll say it again. I think everyone in the world has something important and worthwhile to say. But it's not enough.
Great content is, well, great.
And your visitors will appreciate it immensely, and hopefully they'll send you tons of email to let you know it. But they won't come back. At least not more than once or twice. Because great content is great the first time, and then becomes boring and repetitive after you've seen it a couple of times. You have to change your content constantly if you want people to return to your site.