It would be nice if I could break up my practice into chunks but my day job keeps me away from my instruments all day. I’m lucky if I can get an hour or two when I get home. But I do have down time at work when I take walks and listen to music, sing, and do some “ mental transcribing” For those fast passages Mark, try an app that slows down the music and loops it. I love Yamaha Chord Tracker. It’s free !