Trade like it's a job, not like it's your money. EMOTION is the #1 killer of profits. Take emotion out of the game follow a strategy and profits will follow. Well.....maybe.
Trade only when the edge is in my favor. Concentrate on good defense - think of taking a loss as playing for better position (stops and re-entry -- commissions are insignificant). Let the profits take care of themselves. Never calculate how much I'm up/down in a open position (way too tempting to take profits too early). Increase size only when closed equity hits a new high. Keep my risk in any one trade to 1/2% of equity. Enjoy the process of trading (think of it as a game against a computer instead of other participants). Remember why I'm trading --- to make money so I can enjoy other things. When I have a larger than average winning streak, I take some money and blow it on fun things (new car, weekend trip to another city, gift to some group that needs help in my locality, etc.).
When I have a larger than average winning streak, I take some money and blow it on fun things (new car, weekend trip to another city, gift to some group that needs help in my locality, etc.).