Consistently trading with discipline problems instead of finding someone to sit next to you (in person...not online) to help discover the root of the discipline problems and to instill new behaviors that encourages a trader to be discipline while trading. Traders that avoid getting in person help...they may be afraid to discover that they are not suitable for trading or afraid to discover that their discipline problems had an easy fix. Don't trade alone if you have consistent discipline problems while trading.
Blow all the options trading profits on the girl next door, hey she was fit and local, then over trade the account without a hedge and blow the account over night trying to hide this lol Averaging down on moves that are likely to keep going against me is my biggest issue, solution, reduce margin, trade bigger lots 55% ish of margin, so i can't average down and stopped trading DAX that one, likes to look like its stopped, but very slowly creep away on me, then jump 20pts and close 10 past SL. And it never has a little spike my way to let me out.
Reading forums too much, and/or paper trading too much, and/or studying too much. Just ....Jump In. and KISS: keep it simple, stupid. many people try to play all sports, so to speak, ....pick your sport -- and master that, and just do that.
Never let people tell you can't succeed. Never say "Huh, didn't think it would do that" Never say "I thought that report comes out tomorrow" Never say "Why didn't I put broker's number on speed dial" Never tell people what you do for a living, they will either laugh or ask you for loans.