I am the world's worst worrier for all things lost. I can recall dozens of things that I know I have lost that seemed important at the time, and I still have fond thoughts for and would like to have back. I still fret over things I lost as a child.
It amazes my OH that I even remember the things I've forgotten where I put.
I hate hate hate losing things. It worries me. I feel troubled until it's found or I realise it's gone for ever.
I also lose chunks of time, especially if there's too much happening at once. I guess losing time is worse than objects

Try to visualise where you would be if you were the thing that was lost. That usually works for me.