To quiet the mind you need to make it understand itself and how it is triggering. Try to ask these questions repeatedly the next time you meditate and you will probably realize how you can think more effectively towards a greater cause.
Why am I thinking?
What is making me think this?
Why would it be of any value to continue this thought?
..just a random insight I had ;)
Location: Phnom Krom, Siem Reap, Cambodia
Camera: DJI FC2204