My plan for January is to re-join a gym and stop drinking for the month.
My gym membership stopped after leaving my last job, I did try and join a new one a month or so ago but as chance would have it there was a fire in the gym (the one I was going to join) underneath work that very morning. December's been a busy month on the social side of things so i've postponed it to the new year. I imagine it'll be packed to begin with but i'll persevere. When I was a member of the last gym I did some form of exercise (including rugby) nearly one in every three days. If I can keep that up i'll be back to my superfit adonis body in no time.
As for the non-drinking, this will be tougher as 90% of my social activities involve drinking. I tried it last year and I think I made 4 days. This year i'm going for 31. Tim said he lost loads of weight when he gave up for a month or two so hopefully that'll happen for me too.