I'm wondering if it is somehow possible to mark those answers which really worked for the OP? PMSE is a bit different than SO, because on SO you can easily check out the answer, and when it works, one simply accepts it. Here on PMSE, trying out the answer is usually not trivial and takes some time. Additionally, accepting an answer is more like a "like" on facebook.
Maybe it is not possible to have another checkbox, but what about a tag, a flag or something else.
For example, I would like to know whether this answer worked or not.
What do you think?