Most of the suggestions I'd do are to try and just be as specific as possible with a question. One of the recent ones I responded to was someone asking if power attack could apply to touch attacks. In certain circumstances yes it can, so we asked the guy what he wanted to use it for and it was the gray Guard's ability that let him use Lay On Hands to deal damage to living creatures. In that specific case, the answer was no, but until we learned that all we could say was "It'd work in certain circumstances" and of course making an exhaustive list isn't feasible.
So it's basically if someone has a question about an ability, they should actually mention that ability, that sort of thing.