Making the site
HTML is a huge topic, and we've linked to a few sites on the links page for you to enjoy some further reading. Have a look at the HTML Guide page.

Updating the site
How often are you going to update the site? Careful planning before the site is created with give you a timescale to work to. The more often the site is updated the more likely people will return. You have to build confidence with your visitors. If its often updated with useful and relevant information people will bookmark the site and visit often! This loyalty to your site is what you want to aim for. If people trust your site then they're more likely to think about spending money through it! Make it worth coming back!