Some achievements are simply refusal sustained for years.

Some things are accomplished not by doing anything remarkable but by continuing to refuse: refusing to quit, refusing to lower the standard, refusing the easier version. Nothing about it looks like achievement from outside, and over years the refusals accumulate into something substantial.

Identify what you are refusing in your current effort. Name it plainly. On the days there is no visible progress, holding that refusal is the whole of the work and it counts.