This is an interesting question, as it asks much about how the applicant thinks. Personally, I'm already pretty good at searching. I think some amount of context would be good (like Froogle when I'm searching to buy something, vs when I just want product information). But I realize that I'm not a typical searcher. As I've mentioned before, most people are just starting to get used to using two words in their searches (up from just one), while I typically am so specific about my searches that I generally only get a few hundred results, and sometimes only three or four. So in order to think like the average user, I'd have to work way outside my normal box.
Just for fun, I tried Google Imaging with the most bland/wide/generic single term I could think of: art. The results were curious, to say the least. My favorate on the first page was this:
Hmmm. Ducks in neon with buggy. Destined to be a classic.