I'll start with the most important point: prioritize survival first, then think about making money.

Many people enter the market thinking about doubling their investment immediately, but end up not lasting through even one cycle.
I set a strict rule for myself: position size must be controlled, and when losses reach a certain point, I exit—no excuses, no storytelling.
It sounds conservative, but over the years, these rules have helped me avoid most big pitfalls.
And one more thing, making money often depends on waiting, not actively trading.
In the past, I could place over ten trades a day, busy as if I were working a job, only to find that the profits were less than the fees paid.
Now it's much simpler—if I understand, I trade; if I don’t, I wait.
At most two trades a day; the third is probably no longer a trade but an emotional overreaction.