1) Don't burn the bankroll.
2) RESPECT the trade. It can and will go south on you many times. Control the loss and move on. No big deal.
3) Patience and Discipline. Follow your plan. Trade your edge. If you can't see your setup, don't trade.
4) Understand the "Why" of your trade. Why did you enter? (Moving averages, MACD, Stochs); Why will you exit? (Stops)
5) Market, Sentiment, Fundamentals, Technicals.
6) View your trading as part of a series of trades. Control your losses and let your winners run.