Willpower Begets Willpower

Better sleep provides the willpower to get up early. Getting up early provides the resource to start a day with something good for yourself. That workout or reading or meditation puts you in a dominant position to control the day. And so on.

Additionally, I would argue each decision represents in our minds our perceived identity, which then influences our subsequent decisions.

I've seen it many times where someone makes one bad decision and their willpower evaporates. In their minds it marked the end of the road; and now they are fully committed to throwing away opportunities.

In the same way, it can simply begin with one execution of willpower to beget more.