For me I have to ask where it is. Literally. Ask out loud while I’m looking for it, typically to an audience of no one, but sometimes my gf, “Where in the FUCK is my ITEM?”. Without fail, my eyes will immediately land on the subject of the rhetorical query, and it is always on a surface that I have very nearly, but not quite, comprehensively searched multiple times.
Tip for finding something you know is right in front of you
Touch everything...