Take your icon game to the next level. Check out Fonticons, from the maker of Font Awesome.
             

fa-caret-square-o-down · Unicode: f150 · Created: v3.2 · Categories: Web Application Icons, Directional Icons · Aliases: fa-toggle-down

After you get up and running, you can place Font Awesome icons just about anywhere with the <i> tag:

fa-caret-square-o-down
<i class="fa fa-caret-square-o-down"></i>

Looking for more? Check out the examples.