Trade too much
This is probably the very common case. Trade too many orders at a time. I once met surfing traders who traded hundreds of orders a day. Almost every day glued to the screen to transact. People who trade this way often hate to set stoploss, of course I still meet people with stoploss and they often take short profits, enter the market continuously and can say their trading history is very beautiful. , rarely see loss orders.
However, once they are at a loss, these traders are the ones who are most psychologically vulnerable, but because they trade often, they always put their capital and psychology behind the priority list. transaction plan. A single loss can make them more vulnerable to psychological and trading out of control. Even resulting in gongs and account destruction.
This is highly effective, avoiding over spending is a great help for traders. Do not trade too much, yes trading is exciting and fun but you don't necessarily need to do it all over the time. Take a break, and look around you might be not aware of the incoming storm though. Know when to stop specially if you are being all controlled by your emotions.
Know too many methods
Many traders take a long time to read and save on trading and then apply to their account. The result is more than expected. Losing no more armor, losing to the end.
I don't think it is bad idea. Knowing a lot of methods is helpful specially if you are not lucky in a certain way of trading so, at least you are flexible to adopt certain changes.