becoming a professional trader is not a one-night job, it takes years of patience training so you can make the best decisions. the point is focus, be patient and don't panic when trading.
Common mistake of most people is that they do rush up into things on learning them in the shortest time as possible where they do believe that they can make out money just like what those veterans did without even thinking on what are the things that you would need to learn first before going into a battle.
Trading practices and habit would really be mold up along the way.Some might be helpful and the most are just factors that would really cost you money or would result into mistakes.
People should always spend enough time on practice, try to control your emotions and proper finance handling.These are main keys but actually a hard thing to be learned to control on.