My proposal could be as follows :
Do a 30-day challenge, focusing on just ONE habit.
Write it out on paper, along with your motivations, obstacles, and strategies for overcoming them.
Commit fully, in a public way.
Log your progress.
Remain publicly accountable — report on your progress each day.
Have support for when you falter — either in real life or online.
Reward every little success.
If you fail, figure out what went wrong, plan for it, and try again.