Make good habits inevitable and bad habits impossible.
A good practice to establish good habits is to make bad habits impossible to execute and make good habits inevitable.
Think of how to make good habits inevitable.
For example, buy a standing desk (health), get a dog (happiness), use smaller plates to reduce caloric intake (nutrition).
Think of how to make bad habits impossible.
For example, cut your cable service, mute your phone, delete games and social media apps from your phone.