This is not a proper tutorial, but only a couple of way to shorten up your stylesheet and make it look slicker.
The first is for the font tag; usually, the font is styled this way.
To make it shorter, you can style it like this; nothing will change, but your stylesheet will become more professional.
font: 10px Arial;
Next one is for the padding and margins - meaning thoes tags that define the internal and external spaces of a design; many style them like this.
They don't know there is a much faster and more professional-looking way to style.
padding: 2px 0px 2px 0px; --> in the order top right bottom left
margin: 2px 0px 2px 0px; --> same order as padding
Next is the tag for body background; usually, many style it like this.
background-position: top center;
There is, however, a
shortcut for this too; I don't actually use this as I prefer the old way - just for personal whims.
background: #cccccc url('IMAGE-URL-HERE') top center;
I shared these to help others, but in the end it all comes down to personal preferences; you can use them or not. Just, if you do please credit Skyrose.