Time management with music practice is so important. Unless you have unlimited time to spare it is important to make the best use of your time. As you progress in your instrumental studies you find that you have more and more that you need (or want) to practice, but it’s rare to have regular, long stretches of time. Instead of always trying (and often failing) to find hours of time break up the tasks and work in shorter stretches. You still get the job done! Of course, if you have the luxury of a long stint playing - enjoy it! However, if that isn’t the case divided practice is the answer. I remember some of the stints of huge scale lists that I had to get through (I even find my old lists!) and I’m going to revisit them… but not all at once.