Hopefully this pile isn’t too big! If it is, you might need some support.
First I suggest you quickly go through the pile again. You may find that your subconscious mind has made the decision in the background.
If you are still unsure, this is where a friend can come in handy, ideally someone who’s a good listener and happy to talk through any difficulties you’re facing. You can also try having a short imaginary conversation with any items you’re unsure about. Trust me, this works – it helps you find out if the item has something to tell you, which may be why you can’t let it go. Sometimes just a little bit of story needs unravelling before you can make peace with something. Some of the things may have such a strong emotional charge that you won’t feel ready to look at them: these are your ‘gremlins’, if you come across any of these, pull out the Gremlins card from the box and put the items beside this.