You, like most people, probably vastly overestimate what you can get done in a day. Same with a week and even a month.
But like most people, you also probably vastly underestimate what you can get done in a year, ten years, or your life.
I’m not sure why that seems to be the barrier. But for most folks, you should be more ambitious with your years and more deliberate with your days.
I know it sounds strange to say this, but you can probably only accomplish one moderate thing each day. One! Everything else is mostly filler and treading water, because those things actually take up a lot of your day. Just working and feeding yourself and sleeping and stuff takes up a lot of your juice, and if after all that you only accomplish one decent thing you’re in fantastic shape. Why fantastic? Because think about what it would look like if you accomplished 365 moderate things all in a row.
That’s why you underestimate your years.