Shahade says so many great things that could move the usual opening discussions here to a higher level:
I’m sure you’ve heard the cliché that “Studying the opening is not very important, you should study tactics/endgames/the middle game before worrying about the opening.” Though I agree that studying tactics, positional play, endgame ideas is very important, I think studying openings is very valuable and should be an important staple of every chess player’s study regimen.
The best reason to study openings is that when you do it right, you aren’t only studying an opening. You pick up many important strategical/tactical concepts in the process. When I study an opening, I almost always learn a few common themes that transcend just one opening.
SmyslovFan mentioned IM Shahade's USCF articles in one of Chicken_Monster's topics. I've read them too and they provide the best recommendations for opening study I've seen anywhere.
Not only is Shahade an IM but more importantly he is the founder of the US Chess School and is deeply involved in teaching chess.
Greg on Chess: The Value of Studying Openings
http://www.uschess.org/content/view/11692/665
Greg on Building an Opening Repertoire
http://www.uschess.org/content/view/11634/675