I've been thinking for a while that something like a little star or red exclamation mark would be a helpful feature for some players. I have caught myself several times selling back items, ingredients, pixpals, without realising that I actively needed them. A mark of some sorts that the individual user could toggle for what stuff they need to especially save from hoards would be sufficient if possible.

Not sure how helpful others would find this feature, but I thought that maybe I should write it here.