Relocating for Rennovation

Preparations for rennovation are continuing. I decided not to take my desk with me. Who needs that much storage space at work anyway? I will have a desk sized table with a desk topper and an arm off that table for typing. The person in charge of the move is pleased that I am not taking a desk along, and now I am starting to regret my decision. All the drawers are emptied, and my life at work is strewn over the top of the desk and the top of the table where I do most of my work. I have a one drawer locking file cabinet for the files one needs to keep locked up, and that is stuffed to overflowing. What I am wondering is how I accumulated so much stuff, why do I need it all, and how much will I throw away?