Buy Onions in Bulk
A few weeks ago we bought a 10 lb. bag of onions because it was cheaper than the 1 lb. bag. In all honesty, Nick and I thought for sure we would have them all eaten up before any went bad because we just love onions that much, but clearly we didn't.
When I noticed that some were sprouting, and a couple had gone right bad I didn't want my onions to go to waste. So I froze them.
If you want to freeze onions, first you have to chop them all up. Once they're diced you just throw them in a freezer bag, get out as much air as you can and throw it in your freezer. Whenever you need some just smack the bag a bit and the onion pieces should break apart.
The onions that had gone bad were thrown in the compost, and I decided to try growing the sprouted onions.
More on that later though.