Just a few of my favorites (and what I picked up from them), but not a complete list of the valuable posts/posters:
Lescor: Consistency. Make small consistent profits and protect capital.
Dustin: Don't fight the trend. Buy up stocks, sell down stocks.
ProfLogic: Use of constant Volume bars to the see the trend.
Seanote: (remember him?) Patience and discipline.
40yotrader: (another oldie) Yes, a newbie can learn to trade if he has a good, back tested plan.
Cutten: His post on scalping DAX to a struggling trader is a gem.