Similarly, no matter how much instruction I've gotten in meditation over the years, I still go back to Tilopa's advice all the time [1]. Just rest.
[1] https://unfetteredmind.org/tilopas-advice/
In case you didn't know of them already, you might find the following books interesting;
1) Mind Training: The Great Collection translated by Thupten Jinpa.
2) Essential Mind Training translated by Thupten Jinpa - This is a subset from the above collection.
Similarly, no matter how much instruction I've gotten in meditation over the years, I still go back to Tilopa's advice all the time [1]. Just rest.
[1] https://unfetteredmind.org/tilopas-advice/