High-performance expert Tony Robbins says:

"Energy flows were attention goes"

To stop overthinking, you must address the problems at hand. When you feel overwhelmed, take some time to write down all your thoughts in your head, but then shift your attention to the solutions.

Give your power and energy to solutions.

The problems and thoughts you list are the weeds creating stress and anxiety. After surfacing them on paper, or voicing them to a friend, now's the time to brainstorm solutions.

Is your work causing you stress? Okay good. Now, what changes can you make to reduce it? Is your stagnation in life causing you anxiety? Ok good. What steps can you take to get more clarity on the goals you need to pursue?

Being open and honest about your thoughts and sharing them with someone you trust can offer a new "out of the box" perspective. Sometimes, we just need to "vent" — but don't make this a habitual go to escape.

I always say to friends:

"I'm here if you need me. But come to me with solutions, not problems."

If you arrive with (at least) one solution, that means you've taken the time to think and swim through your thoughts. Coming with problems means you're at square zero.

Learn to manage and regulate your emotions, thoughts, and mind. You can build the mental strength for it.

Get your thoughts out of your head so you can raise your awareness of them and observe them. Then shift your attention to the solutions you can create to relieve them.