Sometimes when my husband has wandered off into the vast reaches of the supermarket and I need to find him, I use a sort of mental radar to seek him out. I stand still, close my eyes, mentally ask him to show me where he is, and then I imagine that I am in the centre of a radar screen and that a sensor is extending out from me sweeping the store. Then I wait until I see/feel a blip. Ah there he is. The cookie aisle.