Round table

I always look at the faction of these units – whether they belong to me or to my opponent. Whoever they belong to, that side will win. Sometimes, this can even help me decide whether or not to take a rest during a game. (Just kidding).
My personal observation – which has always been 100% accurate in my games: the blue Castle always has hidden resources, at least one (while the red one often has none!). I don't know why this is the case.