So how do you break gdi again?

So is there some simplified strategy advise that someone could give me? I just Stared playing. I'm doing ok I think, I'm playing in tournament. My strategy so far has been pretty random but mostly technology research.

ok so what are stored turns? how are they used?

So I'm now to the game. Sometimes I have lets say 150 acres unbuilt why does it than say I can only build 76 of those acres? even if I have sufficient funds and turns?