In a prior post, I wrote about the importances of websites, and the ability to create and design them. Alexander K. Riley mentioned a great website where one can learn to write HTML as well as newer and more relevant types, for free.
This website is an excellent place to expand your knowledge of the web. They offer step-by-step tutorials with very accessible examples. They explain everything from CSS to Flash. If you don't know what those are, start soon.
Mastering the lessons offered at www.w3schools.com is about as valuable as a college degree. And if you have both... all you need is a little ambition and you're on you're way to an early retirement, or at least a good paying job.
www.w3schools.com is a great way to learn basic and advanced html. In addition to many many other things. Visit it. I am ecstatic to have found it.