Anyone done this before?
Rather than trying to commit to a year I'm going to set an intention of adding something to improve my life on the new moon e.g. Walk an average of 70,000 steps a week. On the full moon I'll review it and see if I need to adjust it a bit, ditch it or continue, and also remove a habit e.g. Ditch the mid morning snack.
The aim is that you review each habit on the new and full moon, so nothing lasts for a 2 week period unless you choose to continue. You add improvements when it waxes, and remove something when it wanes.