Jeez, I feel so satisfied that I've finally sorted out the giant pile of books, papers, documents and trash on windowsill. I've found the contract-related documents for a jobs, which I quitted years ago; ancient math notes, part of which I couldn't even decipher; receipts on electronic things, which I don't even recognize... Finally they all have found their sweet home in the trash can. While the books, of course, have travelled to the bookcase.
Sounds horrible, that I've done it only now. This pile was so scary... ...but anyway, now it's gone. It's gone. It will not scare me anymore. It's defeated... at least, for now.