It is combination of luck and research that produces best results.
Probably.
For some questions, it really pays off to do a bit of research. For example, when answering one of those tennis "Who will reach the semifinals?" questions, it's a good idea to check the draw before answering. Then, there's this week's question number 6.

We should ask all players to answer how much time are they spending on research for answering questions, this would be interesting stats to see.
That would be interesting to hear, especially from those who regularly top their leagues (if they exist). I wonder how many people mainly on their gut feeling.