1.  Undercapitalized.  If the trader does not have the adequate capital to trade with, then money, not learning how to trade, will be the primary focus.  Few, if any, ever succeed trading scared money.

2.  Overtrading.  The idea is to make money and keep it, not give it all back because of recklessness.  There is no such thing as being perfect when it comes to trading. Overtrading will easily prove just how imperfect you are. 

3.  Trading Too Many Markets.  Learn to be a specialist because in trading it is best to put all your eggs in one basket while knowing how best to watch and protect that basket very closely.

4.  Believing You Are Invincible.  Few activities teach humility as well as trading.  Seasoned traders respect the risk while novice traders treat success as their birthright.

5.  Lack of Dicipline.  You have to have a game plan when trading.  Failure to have a plan betrays your lack of discipline and feeds your desire to trade off the cuff.  Trading this way is a recipe for disaster.  Just ask someone who has tried it.