I'm a horder (or should that be an horder?) It pains me to see things thrown away, that to me have no value, but still retain something about them that could be useful in the right context. Of course by this definition nothing would be thrown away. This is a state that we should be in. Landfils are getting very full.
In the part "the old days" of computers when I first started using them, floppy disks could be 5.25" wide - and really floppy. There was a notch on the side of the disk that you could cover up with a small sticky label. This had the effect of making the disk protected against being overwritten.
Time of course moves on, and the systems that used this disk have gone by (or collecting dust in my garage). But I still kept those labels in an envelope full of various different types of labels. 15 years later we were packaging up some greetings card to sell for charity. We needed some small sticky labels to seel the packets. Those old 5.25" labels came out.
So next time you think "that might just have a use" save it, but be prepared to wait for 15 years!