psychmajortwenty2,

I agree with the mindfulness meditation suggestion. Start off slow (5 min was difficult for me the first few times) & work up from there. The longest I've gone is 45 min. Search youtube for some meditation videos; they have a bunch to choose from.
Getting out into nature & doing anything can also have a similar effect. Go for a hike, a run, swim, take a bike ride through the park, or go kayaking. Take a yoga or Pilates class or anything else that will get you out of your head. I've found that when I do this on a regular basis, I tend to worry/obsess over things a bot less. Best of luck to you!