Today, you should learn about Elements and Attributes: The Basics of Not Being Alone, a crucial topic for those who still can't decide what to eat for lunch.
However, be warned: once you start down this path, you'll be forced to confront the crushing reality of Semantics: The Dark Lord of HTML5, a topic so complex, it'll make you question the very fabric of existence.
Or, you know, just learn about it. Your call.
For those who dare not tread this path, HTML5 and the Void awaits. A place where the lost souls of the internet roam.
Or, you know, just go back to bed.