I was in the same boat about 4 years ago and my Doc told me to keep my daily calories at 1200
I was drinking that much beer on a daily basis back then. So obviously I cut out all alcohol, started to follow a Meditteranean diet and clean eating when it comes to "snacks" and joined a gym.
At that time I was being tested every 3 months, once my numbers started to drop, I was tested every 6mos. This lasted for about 2 yrs and since then, I've become accustomed to my new style of eating and also get plenty of exercise.
My last test was last May (2012) and I was still in the clear, but I'm due to be tested again, but I should still be good.