Canned beans. Earlier this year, I read (here somewhere) of someone cooking dried beans and freezing them. It had never occurred to me to do that, even though I've always considered the canned flavor quite inferior. I used to open a can of black beans for nachos, eat them for days, and still throw some away when they got too old. Now I cook a dry pound, freeze, and thaw only the quantity I need. I've done this with garbanzos too, and now I make hummus a lot more often than before--again, the canned taste was kind of a deterrent. Better flavor, less waste, and cheaper too!
Many thanks to whomever mentioned freezing beans!