1. Build your own subscription based membership site.
Your visitors will be looking for information, and will be willing to pay to have all information they need in one place for easy access.
Your membership site can provide your customers with this, by making them privy to a complete line of downloadable products, resources, or insider techniques and strategies to promoting or marketing their businesses online.
You can also create a membership site that allows your visitors to search for information that isn't readily available, such as for publishing contacts or work at home jobs.
This can be extremely profitable for you and provide you with a residual income as your customers renew their memberships.
2. If you offer a free service to your visitors, to drive repeat traffic to your site, add special benefits, options, or tools to your service that your visitors must pay to use on a monthly or yearly basis.
3. Develop and sell your own line of products or services that your customers must pay for on a monthly or yearly basis such as autoresponders, webhosting, or domain names.