Off the top of my head? Canned goods. Some cereals. Granola/energy bars (Clif, Nature Valley, Kind, etc). Cooking oil.
And yes, when I think of it, I do over-ride to toss. But I don't always think of it because I don't work GS as much as I used to and the line is usually all the way to SCO by the time I get sent up to help.
