As with financial wealth, time wealth is relative. It can easily be achieved to some degree and can be achieved to a high degree by refraining from being stupid and follow the fundamentals.

Whatever you are doing right now, you're paying for it with your life. Getting better with allocating time is more a matter of attention management than time management but you need to realize when you are wasting time, and stop it!

The Feynman Technique: How to Learn Anything. Learning by Teaching. With the technique we remember better by actively engaging with the information,creating our own version of it - optimizing for output

Do you really care about the content you are going through on Facebook or Instagram? Does it register? Will you remember what you are reading in 1 month or even an hour from reading it?