What did you do to become a disciplined trader?

I loved the money more than the trade.

When you want the money more than you want to be right, the rest solves itself. You build a system, based on numbers and odds, not emotions and opinions. Then you stick to that system because the numbers never lie, but opinions do. You should have enough research and development completed so you know, for a mathematical and provable fact, that over time you'll make money because the odds are in your favor. At that point there's no worry and you'll stick to the script.

The odds need to be provable, not an opinion. Like whenever Martingale comes up, I have to sigh because if you actually run the numbers and do the math involved, you can start with $100 and try to double it. You only have 36.6% odds of that happening before you go bust from a 6 in a row losing streak.