There's a line about golf so famous almost everybody's repeated it without ever really thinking about it — and it turns out it might be completely wrong. Today kicks off a five-part series built around a brand new book from a coach who's worked with Tour pros and world champion poker players.

Stick around for the story of a missed four-footer that changed one man's whole career, and a much better way to think about what your mental game is actually there to do.

Every golfer thinks replaying their worst shots is how they get better. Turns out there's real research showing that's only true if you do it a very specific way, and most people are doing the exact opposite without knowing it.

There's a tiny shift, something as small as one word in your head, that decides whether a bad shot teaches you something or just ruins the rest of your round. This one closes out our Bad Advice series, and it might be the most useful habit in the whole run.

I used to think the golfers hitting the most range balls were doing everything right. Turns out there's a second half to that practice most people never get to — and it's the half that actually shows up on the course.

There's a batting practice study from the nineties, and a quieter follow-up on golfers, that together explain why some grinders never seem to close the gap between the range and a real round. Once you hear the fix, it's a two-minute change to how you already practice.