Hi David,
GDI doesn't track sites that you make personally. The reason most likely is that the affiliate pages have tracking codes installed on them by GDI.
But, there are numerous ways you can track your website.
One is through Google Analytics. Just search for Google Analytics and sign up for a free account. They will give you a bit of code you insert on your page/pages and it will not only track visitors, but also help you maximize it by providing data on what keywords people find your site by and so on.
On my blogs I use a plugin called ShareThis. It also has a tracking feature. It's not as in-depth as Google Analytics and is mostly meant to give you information about social site traffic. But it does give you information on how many visitors your domain receives. You don't have to set it up on a blog though, just do a search for ShareThis and they will give you a bit of code to insert the button on your site. The button is handy, of course, because it gives visitors a way to quickly share your website and different pages. And it's free too.
There are a few more free programs that will track your site for you. StatCounter is one that comes to mind, though I have never used it.
And then of course there are paid for tracking programs that go really really in depth.
Hope this helps!
Vincent Parker
