It is crucial that you create for yourself a system or methodology that enables you to trade in a way that historically wins, controls risk, and does not bring your ego and your emotions into your trading in a destructive way.
Eleven questions to ask yourself before every trade:
How Do I define my trading style, swing, momentum, break out, trend following, reversion to the mean, or day trading?
How big of a position do I want to trade? How much capital am I going to risk?
What is my risk of ruin based on my capital at risk
Why am I entering the trade here?
How will I exit with a profit? A price target or trailing stop?
At what price will I know that I was wrong?
Will I be able to admit I was wrong and exit the trade if my stop is hit, or will my ego make me hold and hope?
Can I emotionally handle the loss with out blaming the market?
Can I really risk this money or do I need it for upcoming bills?
Am I committed to persevering in my trading regardless of the outcome of this or any other single trade.
Will the Outcome of this trade won't effect my upcoming Trades? I believe the answers to these questions will determine your success more than anything else.