figure & figcaption
Use them together to tie a text from an image. Like:
<figure> <img src="path/to/image" alt="About image" /> <figcaption> This is an image of something interesting. </figcaption> </figure>
This is an image of something interesting.
Text input attributes:
type="email": indicate that you expect an email address.
placeholder="text here": when empty, the input will contain the value of the attribute. As soon as you type something, the hint text will dissapear.
required: indicate that a value is required. In a browser that supports this attribute, the form cannot be submitted until a value is placed in the textbox
autofocus: use this when you want the field to be focused by default
pattern="regex value": a regular expression to validate the field's value against.
More HTML5 tips here.