To do well in trading stock, read lots of good books on trading, learn all about when to buy and sell, cut loss and taking profits. After knowing the theory and wanting to adopt this right mindset, we need to put this into practice with actual trade execution. It is very difficult to follow your cut loss rules when the amount is big, as such my advise is to do small trade and then execute your trade according to your set rules. After many such trades, this way of trading would becomes a habit that can help you trade successfully. You can then slowly increase your per trade amount. Knowing what to do is good, proper execution is how you can becomes a winner. Remember in trading you win some and loss some, but if the overall result is a plus then you know you are heading in the right direction. Good luck.