Patience
That's exactly what happens in successful stores. And the cool thing is, the growth doesn't necessarily stop. Some of our users have been online for almost three years, and their sales are still growing just as fast as they were at the start.
The graph at the top of the page shows the growth in sales for one of our users over a period of two and a half years. There are ups and downs (due to advertising) but the general trend is always upward.
The Internet is big. There are millions of users, and thousands of sites competing for their attention. It takes patient effort to bend something so big in your direction. But once it gets started, it has the momentum of a truck. If you can get a small, solid customer base, and keep them very happy, that and time are all you need.