I am not sure if there is much correlation between the programming quality and commit rates.
Based on ~5 years of professional programming experience, I'm very confident there is a strong correlation between programming quality and commit rates. (Though Goodhart's law may be a danger)
The new year is a popular Schelling point to make changes to your activities, habits, and/or thought processes. This is often done via the New Year's Resolution. One standard piece of advice for NYRs is to make them achievable, since they are often too ambitious and people end up giving up and potentially falling victim to the what-the-hell effect.
Wikipedia has a nice list of popular NYRs. For ideas from other LW contributors, here are some previous NYRs discussed on LW:
(If one of these were from you, perhaps you'd like to discuss whether they were successful or not?)
In the spirit of collaboration, I propose that we discuss any NYRs we have made or are thinking of making for 2015 in this thread.