Strategy
Win before you fight
Strategy is not about pushing harder. It is deciding which battlefield deserves your effort before you enter it.
Strategy does not teach you to push harder. It teaches you where effort is not worth spending.
Moving fast into a bad game
Action is often confused with speed. I used to think the same way. Later I learned that some speed only gets you into a bad game faster.
Effective action is not a hard fight every time. Avoid starting when you are weakest, the other side is strongest, and the rules already work against you.
Define the win condition first
Before acting, ask what winning means, who set the battlefield rules, what resources each side controls, whether another entry exists, and how you leave if the worst case happens.
Proving yourself, defeating someone, and getting the result are three different goals. They may look similar, but they demand very different moves.
Six moves, not two
A situation offers at least six moves: fight directly, go around, delay, retreat, change the field, or form an alliance.
The highest-risk mistake is fighting a battle with no upside just to prove courage. Maturity is not winning every fight. It is knowing which fight deserves to become yours.