This is what I meant in the above post, about rolled-up card stock used as funnels, for splitting seeds into Zip-locs. I also use junk-mail on stiff, glossy card stock.
http://garden.org/thread/view_...
Cardboard boxes (actually "chipboard"), like cracker or cereal boxes, make nice trays to keep things from tipping over. You can cut them horizontally or lengthwise. I reinforce the open end with with 2" wide clear shipping tape before cutting them in half. They also keep my spice jars organized in the cupboard.
However, there is a fine line between throwing fewer things away due to re-purposing, and being an out-and-out hoarder. I try to stay away from hoardeing, but it is a temptation.