It's hard to buy groceries for just one person, so to cut down on wasted food, I've been freezing leftover ingredients. After seven months, my freezer was far too packed, so I cleaned it out, and still wasted a LOT of food.
Once a job comes my way, I really am considering a thing like Hello Fresh. I'll be spending the same amount for food as I am now, but at least it won't be completely wasted six months to a year later.