If you've ever played an orchestral instrument, you'll be familiar with section labels (usually uppercase letters) in the scores, marking the beginning of major passages. The conductor will just say "Let's take it from C" or "two bars before F" and everyone knows exactly where they are.
I decided to try penciling those into some of my scores to help with practicing. I don't need them for coordination (since I'm solo), but
- They help me plan my practicing.
- They make it easier to log what I did in my practice diary.
- They make the musical structure more visible (those are obvious places to change timbre, stroke, etc).
- They're already standard notation in sheet music, so they feel familiar.
I'll likely move them around a bit by trial and error.