lessons
Alright. Then there is the other interesting/fun/environmentally responsible stuff you wanted to save to use "someday," things like blank cards, scrap paper, cardboard boxes, gift boxes, jewelry boxes, screws, elastic bands, envelops, free mailing labels, stickers, note paper, stationary sets, calendars, paper bags, tissue paper, gift wrap (new & used), etc, etc, etc.
My suggestion for this stuff ~ give yourself a limit. A drawer of this at your desk and a box, maybe, of that. If you can’t fit it in the box, drawer, by the phone what ever you designate as reasonable ~ bring it to a school, charity, church rummage, or yard sale. Post it to your local FreeCycle, Criag’s List, or open a shop on eBay if you’re really over~run or people keep sending you the same stuff you’ll never have enough time in your lifetime to use.