When that happens to me I simply use my phone to call my phone. When I hear it ring I know where it is!
This is a little more abstract, but sometimes I’ll be in the middle of doing X when I think “oh shit, I can’t be screwing around with X; I’ve got project X to finish!” Usually happens when X is actually engaging and not feeling like “work”, like researching something on the internet.
While working a crossword puzzle by hand, I think “I better click Save. I don’t want to lose all this work”.
Once I drove by “my car” parked somewhere and thought, “I don’t remember parking there?!”
Once in a great while I’ll dig into my right pocket and am surprised my keys aren’t in it. I then search my left pocket which requires moving the thing in my left hand to my right hand first. Dang, no keys there either. Where on Earth can they be?:smack: