Similar situation to you, I was where you are now about 6 months ago. Except I hadn't played in 12 years.
I highly recommend studying tactics. You may be in "single threat" mode right now and need to start thinking tactical themes again. Stay away from studying specific openings other than the basic principles and review some of capablannca's games for positional principles etc.
Play tactics here http://www.chess.com/tactics/myhome.html
Also, this is just my opinion but I would suggest playing standard time controls 15-30 minutes only when you play live and a TON of online turn based games.
Also start here.. with the basics to get back on your feet.
Study Plan.. http://www.chess.com/article/view/study-plan-directory
From middle-school through the first half of highschool, I was a competitive chess player. I was fairly decent, although certainly not a prodigy. I got 5th or 6th in state one year, and think I had a rating of something like 1500-1600, although I could be pulling that out of my ass. Eventually the drama got to be too much (coach called the police on my mother for basically no reason among other things) and I quit playing for about 4 years.
Now I'm a juinor in college, and trying to get back into it. My skill had deteriorated a lot, and when I first started, I was having trouble with 1000 rated players, but enough has come back to me that I was able to get back to 1200 in about two days.
What is the best way to improve from here? Is it any different than it would be if I was just starting out? Up till now, I've gotten better just by playing, as I've been remembering things more than learning them. What is a good time ratio for play:study?
The only books I still have are a book of opening lines, and Chess Fundementals by Capablanca, whose games I liked when I used to play.