From https://www.bakadesuyo.com/2018/09/how-to-quit-bad-habits/

Here’s how to quit bad habits without willpower:

• Gratitude: The same feeling that energizes us to do good for others can help us do good for ourselves. See positive things as blessings; don’t take them for granted. And then write them down.
• Compassion: The emotion that drives us to help others can also benefit “future you.” Crazy as it sounds, write a letter to “future you.” Feel some compassion for the difficult situations you often put him/her in and you’ll boost self-control.
• Pride: Combined with an appreciation for the hard work and support that goes into any achievement, this deadly sin can be a virtue. Keep track of your accomplishments and you’ll end up more disciplined.