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Here's a practice I find helpful for eradicating attachment and ignorance.
These aggregates are the base to be labeled "I". They are not the "I."
Once you've examined your aggregates and found them to be devoid of self, devoid of an "I", focus on space-like emptiness single-pointedly. Just rest in the absence of the label "I". This is called space-like meditative equipoise on emptiness.
Your experience should be space-like, but you're not focusing on nothing. It's merely the absence of the conceptual "I" that you have been mentally projecting onto your aggregates.
The "I" is just a conceptual elaboration you have been projecting onto your aggregates. It was never really "there" in the first place. So you're not losing anything. Your "I" has only ever been a label, existing in name only, a concept, mere appearance.
If you're not yet certain about the fact of impermanence and non self, go back to the scriptures and also examine the ever changing aggregates until you are certain they lack inherent existence.
Once you're certain, practice space-like meditative equipoise on emptiness and rest in it.
Once you're certain about emptiness and have practiced space-like meditative equipoise on emptiness of the "I" as described above, you can use the following meditation to quickly rest in space-like emptiness...
Say "My I is in space."
Throw the "I" (the label) into space and rest in space-like emptiness.