i lost my keys, hunted around, turned out all the cupboards, looked on floor, got into a state, after a while retracing my steps found them they had fallen into a drawer where i keep the pens, don't ask me how they got there, but there they were....
I've lost a bra :( Still not found it a couple of weeks on.
I found a debit card someone had dropped. I was shouting him but he didn't seem to hear me (headphones on probably) and am not able to run so I phoned the bank on the number on the card who cancelled it for him and I took it to the hospital (where I was) reception and destroyed it in front of them as proof it hadn't been stolen in case he returned to ask about it before he rang his bank.
I have put lots of things in a safe place and not been able to find them after. Not only were they safe from other people but looks as if they are also safe from me.
One of the best ones was going on a pre-booked holiday with my ex in NY not long after we split up. I could't find my set of our flat keys (or the suitcase key which was with them I was looking for). Rang the hotel concierge, the restaurant we had been in etc... in a panic but no joy. Endured some rather sniffy remarks from ex.
We were at security at the Empire State Building the morning after, I went through first and my stuff came out the other side of the airport style scanner...with my keys sat on top! Was a little freaked until ex admitted he had just found them in his pocket where they had been all along!
I lost boy #1 in a shopping centre - he was three, I was eight months pregnant and it was Christmas time, so hideously busy. Obviously I found him but it was horrible.
I lost a silver hair slide about 7 years ago. Last week I opened a drawer and it was there on top of everything. I looked every where for that slide, turned the place upside down.