Offer a few products for sale from your website. I sell my book, but the products that sell the best are the products that teach people how to make money selling plants. Design your site in such a way that each page gently leads your visitors to your sales page. This entire website is designed to sell one simple product. But it is done in such a way that the visitors learn plenty about selling on the internet as they are introduced to my sales message.
Many people just browse, learn what they can, and leave without spending any money.
I offer plenty of free advice from the message boards at both of my sites. That's what keeps people coming back day after day. Make your product digital. Create a simple information product, a 25 page report is great for starters. Then convert it to a digital format that can be delivered electronically.