You can go to https://coffeesource.net/vimukthi and filter with some tags like philosophy, spirituality, psychology, buddhism to find some articles. Here is one: https://steemit.com/buddhism/@vimukthi/an-invitation-try-this-near-impossible-but-very-simple-meditation-challenge-which-even-the-experts-fail-at-philosophy

Mainly what I do is just nothing...... just be aware of my own breathing process without thinking about anything. It looks too simple on paper but it's really hard. Just be conscious of the every breath you take.