I have had some experience breaking bad habits. For me it is always a two step process.
1. Come to a gut realization that a habit is killing me and things won’t change unless I quit completely.
2. Stop completely, “cold turkey”, knowing I will be uncomfortable for a short amount of time.
That worked for me to stop drinking (4/22/86) and to stop smoking (8/22/88). Did the same thing with sugar and carbs to drop 60 lbs in 2013.