I keep mine literally right in plain sight on a shelf with all my culinary herbs... it's in a mason jar among all the other random green leafy shit that I cut down from my herb garden last fall.

Inside a cereal box beneath the plastic bag is a good spot too. Pick a cereal that no one else you live with will even touch... like one of those twigs 'n' bran sorts that are good for treating constipation or feeding your pet hamster.