1. CSS font shorthand rule
When styling fonts with CSS you may be doing this:
font-size: 1em;
line-height: 1.5em;
font-weight: bold;
font-style: italic;
font-variant: small-caps;
font-family: verdana,serif;
There's no need though as you can use this CSS shorthand property:
font: 1em/1.5em bold italic small-caps verdana,serif
Much better! Just a couple of words of warning: This CSS shorthand version will only work if you're specifying both the font-size and the font-family. Also, if you don't specify the font-weight, font-style, or font-varient then these values will automatically default to a value of normal, so do bear this in mind too.
2. Two classes together
Usually attributes are assigned just one class, but this doesn't mean that that's all you're allowed. In reality, you can assign as many classes as you like! For example:
<p class="text side">...</p>
Using these two classes together (separated by a space, not with a comma) means that the paragraph calls up the rules assigned to both text and side. If any rules overlap between the two classes then the class which is below the other in the CSS document will take precedence.