I first like to categorize goals into scope, so long (>6 months), medium (1-3 month), and short term (1-4 weeks). There are of course even shorter daily goals, as well as longer epic goals, but for the most part it's about correctly categorizing things first to avoid frustration and sadness.

I didn't always have frameworks like this (and I wish I had), but this has helped me immensely through professional career, especially when you have to juggle so much repertoire + all the travel, meetings, other projects (like Tonic) etc. but here are a few examples of goals:

Daily goal 1: Be able to play through 2 pages.

Daily goal 2: Be able to add in phrasing + intonation + musicality.

Weekly goal 1: Be able to complete 1 movement (not memorized)

Weekly goal 2: Be able to memorize that movement.

etc. Obviously more layers apply but then you can add another layer (for eg. another piece or movement) when you feel like you have the capacity to do so. I think of "improvement" of technique as something that happens as I learn different pieces. Best not to get stuck on one piece for too longer (longer than 2 months). You can always come back to it later.