I’d like to add an fa icon before a link in my ‘recent post’ side bar [closed]

Sorry, I don’t have enough reputation to ask you in comments: Could would be nice, to show what you want to achieve, but you are maybe wondering about this in CSS (if you have implemented FontAwesome already):

yourlement:before { //replace with your element
    font-family: FontAwesome;
    content: "\f061"; //replace with your icon
}

Here is jsfiddle