Been trying to compound a list of "Much needed stock photos", the word is "trying". Don't quite know where to start, I have the usual & common all (mostly) listed and been trying to think if I've miss out any possible ideas which I'm sure there's lots that I've missed, just can't seem to think of anything.

Current list:
General Plants, Animals, Sky, Buildings, Human.
Detailed Road sign/markings, Cars, Light bulb.
Specific objects: Cans, Bottle, Electronics, Sand.

There's a whole list! Most of them can't be found in my area, like Seasons (because I live in Singapore and there's no seasons here other that rain and shine), certain animals/plants, not much of a nature landscape horizon. So taking all those out from the list, the list look really short and I'm not convince that that's all I can have on the list. I'm pretty sure I'm just not thinking enough -_-

I'm all ears for suggestions, while I'll nurse my headache @_@