Ask HN: How do you manage your time with multiple projects?

This question is not about multitasking (doing multiple things at the same time). This is question is more of a framework for short-term and long-term learning.<p>I will explain this with my situation:<p>I am working on a personal project (say P1) that I would like to ship soon (may be in 2 months). I also have few more ideas of new projects that I would like to work on sooner. I would also like consistently add value to P1 in long term.<p>Additionally, I have curiosity about information retrieval (currently reading a book and plan to start an open-source project to learn how the fundamentals work).<p>To add more to this, I have a full-time work to do.<p>As you could see, there are so many things that I do (at least I feel) and so many other things that I plan to do. I try to manage all of this work with Asana tasks, but still I feel that I could be more effective. I look for inspiration and see people like Elon Musk and wonder how do they manage to run multibillionaire companies? We all have 24 hours in a day.<p>So my questions are<p>1. How you manage multiple projects efficiently?<p>2. This is an art and I would love to learn this skill<p>3. What resources (books, courses, talks, your experience) you would recommend to learn and gain this art?<p>Thanks for reading this far, appreciate your time spent