What I can say by experience is , to stop a race mind, we need to bring ourselves to NOW, all the time. The only thing "real" is what is happening around. So I tell myself, is not even true. Some days are easier than others. And there's the emotional rush. I get it.  But when we question ourselves...from all thoughts that are illusions, it is not happening, right? So, make it "rational"...do something that gives you pleasure and distracts the mind. I like to paint, for example, or taking pictures, I loose track of time.