1. Risk First

"Never lose money." (Warren Buffett)
"The first rule of investing is to preserve capital. The second rule is to remember the first."
2. Understand the Market Essence
"The market is a voting machine in the short term, a weighing machine in the long term." (Benjamin Graham)
"Be fearful when others are greedy, and be greedy when others are fearful." (Buffett)
3. Self-Awareness
"Invest only in what you truly understand." (Peter Lynch)
"The larger your circle of knowledge, the more unknowns are outside of it."