Removing tight Stops from my trades. I now only rely on Disaster Stops (outside current volatility) and Hedging.
This removed the constant chipping away of my accounts. Having stops continually hit even when you get direction correct destroys confidence in your trading.
I should have also developed my automated trading earlier on, would have saved a whole lot of stress.
80% of my trading is now done by EA's and has dramatically improved consistency and profitability.