Assigning yourself a single thing that needs to be done, or you’ve been wanting to do per day (big or small). Then letting yourself fuck off once you check the “complete“ box.
i like to organize my week on a sunday evening so i can start with the important things first. i know everything is important, but i try to do 1 or 2 easy/fast tasks in the beggining of the day so i can have that feeling of finishing something and than i'll focus on a bigger task that might take me a few hours/days.
And then completing it. Applies to "I am a person who will cook themselves a nutritious meal" etc. Not 100% effective, but makes me feel deeply determined when the scheme works.