- Panic Buy/Panic sell.
In both cases, you will lose your money - Ignore Capital management.
If you ignore Capital management you will be gambler not trader
- Following a signal Without risk assessment or stop loss.
You will be like Jumping into the ocean without a lifeline jacket at, before do anything, look at your risk and reward and what your stop level is.
by this way you can set Your Own risk and know what you do.
Thank you for your suggestion! I believe that these three that you enumerated are the mistakes that we always encounter. But I will summarize it in one thing. Be ready when you will enter the market. Trading is so dangerous for newbies who just want only to invest without prior knowledge. Think as it will be your life and be resourceful so that you gain a lot of money.