I list 3 or less, specific, actionable, things to do that I consider to be the most important things for the day. Even if a thing is a tiny piece in a larger thing. Then I either put those into my calendar, time box my day, or just get started.
Getting things done is a function of knowing what to do next (specifically), when to do the thing, overcoming emotion (fear, anxiety, hate, etc) that leads to procrastination, and just doing the damn thing.