here are 358 questions tagged problem-solving.
Question: What's the problem-solving tag for?
The questions with this tag seem wildly varied. By the looks of things, it's mainly added to questions haphazardly.
Update: The above question is a duplicate of http://meta.math.stackexchange.com/q/3222, although I think this tag has been misused since then. Since there's no answers thus far I'll add some follow-up questions.
Question: Do we actually need a problem-solving tag?
And if we do need this tag:
Question: Can we make a sensible tag wiki for it?