I will start by saying: "Do not engage the mind in the intense pursuit of too many things at once; especially things that have no relation to one another"
A couple of questions that can help for solve the above issue are:
1.How many subjects am I currently learning intensely?
2.Do these subjects have any relation to each other?
3.Why am I currently learning the subjects?
4.Have I truly made progress in any of the subjects?
By following the four questions above, you get a sense of what you really need to learn at a particular time.
This article https://leveragethoughts.substack.com/p/do-not-engage-the-mi... goes in-depth into the why and how of learning.
There are other tools that can contribute to a good life. Some of these tools are 1. Journalling. 2. Daily self reflection. 3. Some form of physical activity.
You can find out more on how to improve the mind in https://leveragethoughts.substack.com/p/three-actionable-ins...