Tinned food (or in glass jars, as is customary here, especially for fruit) can come in handy! I am no fan of canned meals, but they do come in handy sometimes and I like to have some oxtail soup in store. Comfort food when I have a cold (I spice it up with chili sauce then).
Fruit in tins or jars are invaluable for baking. You don't really make something like Black Forest gateau with fresh cherries. I have two jars of black cherries waiting to go into chocolate cake tomorrow.
As Sue said, tinned apricots have a great flavour unless the unripe things you can buy.
Strawberries are nicer fresh or frozen, but I still keep a jar or two handy for yoghurts and desserts.
You can get the basics for lentil and bean soup here, just the pulses and soup greens in a little brine. No sugar or anything else added. These are always in my stock cupboard.
Oh, cans of corn!!! Yummmm!!!