I felt like a good strategy was to react quickly to when other players revealed large parts of the board, and immediately mark the "obvious" mines in there even

I felt like a good strategy was to react quickly to when other players revealed large parts of the board, and immediately mark the "obvious" mines in there even though I was looking at another part of the board. Though now that I think about it, marking those mines is just as much a "correct" move as revealing the numbers that come out of such marking activity, but I still have a sense that it is a quick way to gain a few points.