A key thing I realized at one point is that as a human being, thinking isn't free. I have finite energy resources both emotionally and physically, and when I'm

A key thing I realized at one point is that as a human being, thinking isn't free. I have finite energy resources both emotionally and physically, and when I'm thinking, I'm expending those resources. Then, with that in mind, I can turn my analytical mind to the meta-problem of using my mental energy effectively. When you shift this way - when you think of your energy as a finite resource that has to be budgeted and recharged - you see how wasteful all of that extra thinking really is. Look at every train of thought as a cost/value proposition, and it becomes really easy to decline most of the really pointless ones. Mindfulness also really helps. What it really is, is teasing apart ideas from the emotional expenditure that normally comes with them. This attacks the problem from a different angle: making thoughts "cheaper", so that your (still finite) energy goes further. What I've also found, is that relentless overthinking often stems from stress/anxiety (which is of course circularly caused by it, when you're bottoming-out your energy all the time). What this ends up meaning is, if you can free up some of your energy and gain some room to breathe, you'll probably naturally do a lot less overthinking, and have an easier time getting out of your analytical mindset.