There are several things to avoid in trading, however I only choose a few that I think is very important in trading. There is a common misconception that you can learn from a demo account, however, the emotions are different in trading live and demo including the re-quotes that you experience in live trading. Another misconception is that leverage does not cause you to lose your account; this has even spread as high as government regulatory bodies in the US where there is now a cap on leverage. Leverage is not bad per se; however, without using a proper risk management is very harmful in your trading. As long as you commit to your risk management the amount of leverage will never cause you to lose more than you should.