This is great! There seem to be quite some tricks out there, one I learned is to focus on the temperature of your breath and where exactly you feel it while breathing. In the beginning it’s just little moments of thoughtlessness, but you can make them last longer with practice.

There’s also this reply I read on /x/ like ten years ago that has stuck with me, to the question someone asked, “how to meditate” – “Notice the space between 2 thoughts? Enter it.”