Advice to do yoga and meditation (as commonly understood by Westerners) is bad advice. These methods are completely misunderstood by Westerners both with regard to their purpose and with regard to the proper method. Stay away from them until (and unless) you’ve gone very, very far along your spiritual journey, and are introduced to them through authentic transmission.
Advice to seek therapy, counseling, psychiatry, etc., is bad advice. Psychology’s understanding of what a human being is, and what mental health is, is utterly incompatible with an authentic religious view of man and the meaning of life. Your therapist will declare you “healed” when you have become average again, and are “functioning normally”. God, by contrast, will declare you healed when you are perfect – and He will help you get there.
Advice to do sports and exercise to get your mind off of things is moderately good advice. It isn’t a real solution but it does give you respite.
Advice to pray is good advice. If you can, pray in a place of worship, or outdoors. It’s better than praying at home. In general, spend more time outdoors. Home and work environments tend to trigger excessive thought.
Advice to wander in the desert (or the forest) until you meet your own End, is good advice.
Now, for my own advice: what you need first and foremost is not to have your thoughts reduced, but to have them clarified, ordered, and strengthened. Reducing them should not be a priority, for as a natural thinker you will need a lot of help from your thoughts on your spiritual journey. (This is one reason why advice to meditate is bad advice.) What you need is less doubt, not less thoughts.
OK, so how can you have your thoughts clarified, ordered, and strengthened? You cannot do this yourself. Any mental effort (i.e. your thoughts) to fix your thoughts will spiral out of control. In fact it is this unhealthy loop that is wearing you out.
The only one who can order and clarify your thoughts for you is the Holy Spirit, also known as the Spirit of Truth. And as you know this Spirit proceeds from Christ. So you need to get closer to Christ, so that the Spirit of Truth may flow into your mind and start fixing it. This will clarify, order, and strengthen your thoughts.
But how does one get close to Christ? Well, do you know Christ intimately? (I don’t mean, do you know about Him. I mean, do you know Him?) If you do, just follow John 15:4: “Remain in Me, as I remain in you.” If you don’t, then the best thing you can do is pray intently, which is almost as good are remaining directly in Christ.
I hope the above makes some sense to you. God bless.