Perhaps the most interesting packages are those made from strange miscellaneous things that you or others have kept for a long time, but objectively have no real purpose any more.
A friend from my fiber art group brought me these bits of wood, from which somebody had cut little dolls. She thought I might find them useful. And I did -- ten minutes after I came home from the meeting, I made them into a bundle.
And my favorite: a dozen sturdy metal brackets to hold up the heavy blinds in my studio. The blinds came down the week we moved into the house, but the hardware stayed.