The trading journal
Elite traders journal relentlessly. For each trade record: pair, direction, setup, entry/exit, R result, and — most importantly — why you entered and how you felt.
After 20-30 trades, patterns appear: maybe you lose most on Fridays, or when you break your own rules, or on a pair you don't understand. The journal shows your real leaks. Use the ShaFX journal to make it a habit.