When you make an error, exit as soon as it is discovered. Follow the method you have decided, don't change horses midstream. There are technicians that spend hundreds of hours developing tight systems and then develop emotional reasons not to follow them. As you make money, increase your commitment to the market, as you lose money decrease your commitment. Don't trade thinly traded stocks.
Trading is about risk.
Don't fear it. Apply your intelligence and be smart with it. Emotions of trading The hardest thing, even for a very experienced trader, is to take losses. The simple fact is that selling stock at a loss is very hard to do. Focus on the overall result of your portfolio and account return on investment.