What is the best strategy to prepare oneself before entering the trading market?
Education is one the best to guide you before entering the trading market, if you have a friend who has experience enough to teach you or to guide you before entering the trading market will be great. Also prepare some money that you can afford to lose before starting trading it will help you to prevent any emotion burst
Of course, it's easier if you have someone close you can learn from... that can save someone from making many mistakes! Also, I agree with the "money part", it's better to prepare some money and to try to practice right away, it's much better than "demo versions"... I think that learning by doing is the best option, people who enter in trading now should just be careful to not trade with some big amounts, don't do that before you are totally sure how to trade!