belcherj

<span class="wooicon">T</span> // The character you want to display. "T" is the Twitter bird icon.

.wooicon  {
  font-family: @wooicons; // Set the font-family using the LESS variable;
}

belcherj

<a class="icon" href="#" title="#">Something</a>

a.icon:before  {
  .iconbefore_FA; // This will insert all the necessary default properties from the LESS mixin
  content: "\f0a1"; // Set icon value. Find the value by inspecting elements on this page: http://fortawesome.github.io/Font-Awesome/icons/
}