Some principles are immutable and their usefulness undeniable.
These principles are applicable across various domains and mean a lot to me personally:
Self-control
To achieve anything, you have to be able to put restrictions on yourself, and you have to be able to put your head down and work.
Willpower
Motivation doesn’t work. You need discipline. Develop it in one area, and it will overflow into other.
Use it or Lose it
You cannot stand still. Without constant progress, you regress.
Practice of the basics
You will not regret the time investment. You have to keep the bases strong so that they can support something great.
Weaknesses ~ Weak links
Do not ignore them. Identify them and focus on them, unrelentingly. They are holding you back.
Quick fixes ~ Rushing
They’re never worth it. Remember the story about a hare and a turtle? The slow but steady wins the race.
Mentors
It’s unnecessarily hard to do anything without them. Find them and don’t forget to stay humble.