8. Always have risk management and money management! (Unfortunately half of the trader even don't know what these two are)
9. Start from learning by little instead of putting pressure on yourself and making the process stressful!
For me, this is the most important. The risk management.
There are lot of traders nowadays that has still lack of knowledge in risk management, event they are already trading for months or years. Newbie or not, day trader or not. They have still not risk management which is difficult. I admit that I am also like that before, but when I learned the risk management, my portfolio becomes healthy.