Learn, learn, learn, then apply apply apply. Research. Money fundamentals, how much to risk on each trade, how much of your capital to apply to each trade.
Understand why it is easy to buy into stocks, but hard to sell. When to take profits and when to take losses. Psychology of holding losers and selling the winners. Instead hold the winners and sell the losers. Psychology of being right when the price is tanking, take the loss.
Understand that if you are holding a 10% loss, the stock has to go up by more than 10% to cover your loss.
