My family has been buying Mac's since I no longer do their Windows tech support. Now I'm Apple Tech support. Can't win.

HTML5 Essentials and Good Practices

“HTML5, together with CSS3 and responsive design are the new buzz around web technologies these days. This article will help you get started using HTML5 on your projects today and show you some good practices to put what you learned to good use.”

I keep forgetting about the html5shiv script at google. This script enables IE versions below IE9 to recognize HTML5 elements

HTML5 Essentials and Good Practices