Some ideas need to sit, like leftovers that taste better the next day. Come back to it tomorrow.

Some ideas are not finished thinking themselves. Time away lets the parts settle and lets your brain keep working on it in the background, which it does whether you ask or not, and the version waiting for you is often clearer than anything you could have forced. Pushing through is a real skill and it is the wrong tool here.

When you are going in circles, stop and note exactly where you got stuck. Sleep on it and read it once the next day before you touch anything. Whatever looks obvious then was worth the wait.