Around the Holiday's I'm able to stock up my favorite garbage disposal fresheners...
First - eat the clementine. My favorite part.
Then take the peel.
And put it down the drain (this only works if you have a garbage disposal. Try it on a regular sink and I'm pretty sure all you get is a bill from the plumber.) and turn on the disposal.
I throw all my peels in a zip lock back and put them in the freezer so that throughout the year, I can pull one out and throw them in the sink.