been doing that for over 50 years
I have tried tha when thinking out projects of the mind. I couldn't go for even a moment. My mind is allways active as all mnds should be.
I thinks it's literally impossible to think of absolutely nothing
Yah I can help you,I'm good at that only if you have a source pan,bang!eeeeeew!then you'll be seeing stars for five minutes,that's it?
I've tried this before and can't do it. And seeing your profile pic is very distracting in a fun way so my mind wanders effortlessly. A guy I know said a Buddhist monk once told him it's not possible to shut down your brain. The trick is to ignore what's of no value and just focus on the valuable thoughts.