The best traders are boring. They follow a plan: what they will buy, how much, where they are wrong, and where they take profit. The plan is written before the trade, when emotion is quiet.
You cannot control the market. You can control your process. Judge yourself on whether you followed your plan, not on whether one trade won.
Key takeaway
Good process with a losing trade is still a good trade. Bad process with a winning trade is still a mistake.