Margins and paddings

This has become a very popular technique lately, and for good reason. It removes all default margin and padding for every object on the page, no holds barred, regardless of browser. This provides a nice clean slate for design and ensures that all spacing is intentional, explict, and ubiquitous across browsers. There is no reason not to do this.

* {
	margin: 0;
	padding: 0;
}

Source: https://css-tricks.com/reset-all-margins-padding/