The Oil Drum

One more thing I would add to this:

You're going to have grow at least some of your own food sooner or later, most likely. Might as well make the transition sooner.

Thus, when it comes to canned goods, I'd suggest trying to raise a garden and can as much of your own produce as possible, rather than buying store-bought cans. Once you've made the investment in a canner and mason jars, you will be able to reuse them over and over again (only needing new lids, which would be a good item to stock up on); store-bought cans should be recycled too, but it isn't in a way that benefits you so directly.

While you are ramping up production, and even once you've maxed out if you don't have enough space to grow all your produce, you might consider buying in bulk in season at the farmer's markets, and then canning a big batch. In the past, I've considered it to not be particularly worthwhile to do this, but these are not ordinary times.

You'll also want to garden with open polenated seeds, and get into seed storage (most packets will remain viable for several years if stored properly) if not seed saving. What you want to do is to bring the entire cycle home: seed to garden to produce to preservation to consumption to compost & seed.