First, control your position size when investing—don’t go all-in at once; reserve idle funds. Set a mental stop-loss in advance, and exit decisively once losses reach a preset percentage; don’t blindly hold onto losing positions. Refuse to listen to rumors or stock recommendations from bloggers; independently research fundamentals and market conditions. Maintain a calm mindset—market ups and downs are normal; avoid chasing gains and panic selling. Only use idle money that you won’t need in the short term; never borrow or use leverage. Stick to rational planning over the long term, reduce risk, and avoid impulsive actions.