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

fa-caret-square-o-left · Unicode: f191 · Created: v4.0 · Categories: Web Application Icons, Directional Icons · Aliases: fa-toggle-left

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

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

Looking for more? Check out the examples.