Need to seal a bag but don't have a chip (or binder) clip handy? If you've got some magnets lying around (or stuck to the fridge), they'll work just fine.
How to illustrator Yumi Sakugawa offers up a bunch of handy magnet tips, including this one. Just fold the bag over and place a couple of magnets on each side (as seen above). They'll hold the bag shut and keep a reasonably tight seal. For more interesting magnet tips, check out the full post on Wonder How-To.
11 Weird and Wonderful Uses for Magnets [Secret Tips from the Yumiverse]