On sites like StackOverflow it's pretty cut and dry, if someone's answer fixes your problem, you mark it as correct.
Here, however, it's a much different story. Should you mark the correct answer if you used their advice? What if it ends up not working months later when you actually taste your beer/wine/cider/etc? Should you wait until your brew is finished to prove out the suggested answer? Then you risk forgetting to go accept it.
My first reaction is that these types of questions should be wiki's, but then 80% of the site would be wiki questions (not to mention I don't see a place you can make a question a wiki, even if you wanted to). What are we to do?