Albert Einstein, Mother Teresa, Isaac Newton, Eleanor Roosevelt, Leonardo da Vinci – they all had 24 hours a day, just like you and me.
What enabled them to lead such significant lives?
Need some time management tips!
1) Plan the day. Every day.
2) Differentiate Deep Work to Shallow work (read "Deep Work" by Cal Newport asap. Watch his two TED speeches asap).
3) Have strategic goals.
4) Plan for downtime (games, TV etc)
5) Limit the input to your brain (social media, etc.) , especially digital input.
6) Do the 30 days of discipline (boldanddetermined.com )
7) Go to the gym, possibly early morning.
All the guys you mentioned had very limited distractions/input, and/or a very precise schedule.
Love him or hate him, there is a nice video of the first interview of Vladimir Putin as President (it's on youtube) back a decade or more ago. At one point the journalists ask him how's the view from his office. Putin replies that he has no idea. The journalists then ask him if he's not curious, to which he replies : "I am, I just don't want to be distracted by unimportant things that don't interest me."
(Again, not a political judgment on the guy, I just found it a very insightful thought).