I guess only traders who bother about preventing losses may able to follow these kinds of management principles more consciously. But I am a trader who forgets all my own discipline rules and may think about my own set of rules only when my trade turns negative.
Before continuing your trading, you must focus on developing self-discipline and emotion control so that you can get back into the tracks of becoming professional trader because even after lots of trade if you are not working on fixing your spotted weakness then there will be no possibility of achieving the level of pro trader. This meme could explain the scenario more better:
