Realizing emptiness with the Sevenfold Reasoning of Chandakirti. The self too cannot inherently be:

1) the same entity as the aggregates;

2) other than the aggregates;

3) in the aggregates; and so too, really:

4) the aggregates are not in the self somehow;

5) the self does not possess the aggregates;

6) it is not the collection of the aggregates;

7) it is not the shape of the aggregates, nor is it their continuum in time.