The process of web design and development is never really done. Updating, and adding on to your website is something you should always be doing.
Having a website and communicating to your customers is how you get real feedback about your business. Writing blog posts, new FAQ's, announcements, Tweets... all these tools help your customers find out more about you and your business. It's not enough to build a website and call it good. You have to work at it.
We recently designed and developed a website for St. Teresa of Avila Catholic School. The very first blog post created a dozen comments from parents wanting specific additions to the website. As a business owner, you must read (and respond) to comments written on your website. Listen to your customers and give them what they want.
When you engage with your customers, you will find more and more people interested in your products and services. And, most importantly, your customers will tell you what they want and need. Be open to new ideas and perspectives and watch your business grow!