Remember that PROGRESS IS NON-LINEAR.

The notion of getting just a percent or two better every day sounds great, but it's often unrealistic, especially if you are already skilled to begin with.

Keep pounding the stone. Some days nothing happens, some days it cracks a bit more.

For example, try telling these people to get just a percent or two better every day:

Someone who deadlifts 500lbs.
Someone who runs a 2:10 marathon.
Someone who writes beautiful essays.
Someone who develops impeccable code.

Not gonna happen.

If you are addicted to visible progress you will not last very long in whatever pursuit you do.

Frame the work as a practice.
Measure and judge the process.
Let progress be a byproduct of that.