Ad 1: Grace
I wonder if “concentration without effort” is not the key that opens the access to grace, which is always freely available.… when the center of directing consciousness is transposed from the head to the chest— from the cerebral system to the rhythmic system (the tightrope walker, the juggler, St. Dionysius).
Ad 2: Rhythm and Eternity
The lemniscate represents a rhythmic movement and the concept of infinity. It is the symbol of a never-ending loop and thus means forever, no beginning and no end, eternal. Being mindful of nature’s cycles, e.g. the breathing cycle, the daily or seasonal cycles can help us access eternity, in the present. It is the ‘oscillations of the mental substance’ that spacializes time into chronological time, into past, present, and future.
Ad 3: Other practices
All of these will do I assume: Tree of Contemplative Practices https://www.contemplativemind.org/practices/tree