Go to your pantry. Pick the two messiest shelves you have and take everything out and repack. Throw out stuff you don't need/want/past date, wipe the shelves and put everything back neatly. If you see anything on another shelf that belongs on the two you've decided to work put it where it belongs. I did this today and it took me all of 15 minutes. And strangely it was just 2 shelves that needed work.

Go Go Go!