You should definitely capitalize on the time of year and get your name out right around New Years resolution time (as in, now). Maybe put together a short write-up on a few similar apps in the space (including yours) and shoot it over to TC, Mashable, etc. and see if they'll do a New Years resolution app post. I was going to suggest cutting the price in half if you had priced it anything over $1, but perhaps you could offer it for free over the next few days just to increase adoption and capture the New Years resolution crowd. I can see this app going in several different directions (leaderboards for popular commits, holding friends accountable for commits, etc) and really like the concept! Kudos and good luck!
Also just saw that you did OneVoice; I remember reading about that not too long ago. Keep up the good work!