Good for you for not waiting till the New Year to quit. I know a couple of people with a sobriety date of 1/1 who have put together many, many years of sobriety, but a lot more who treated it like any other New Year's resolution and it fell by the wayside when they realized real effort is involved, not to mention changing a whole bunch of other things in their lives.
Make sobriety your NUMBER ONE priority. Working out and all that is great, and might even help your recovery along, but if it's a choice between the gym and a meeting or something, make sure your priorities are straight.